网络监测 Net 断网 网速 ping 完整案例
目录
网络监测 Net 断网 网速 ping 完整案例
Activity
public class NetActivity extends Activity {
private static final String URL_DOWNLOAD = "https://qmuiteam.com/download/android/qmui_1.2.0.apk";
public static final int MESSAGE_WHAT_REFUSH_CURRENT_SPEED = 1;//刷新当前网速
public static final int MESSAGE_WHAT_REFUSH_AVE_SPEED = 2;//刷新平均网速
public static final int MESSAGE_WHAT_REFUSH_RESET = 3;//重置
private static final int DURATION_REFUSH_CURRENT_SPEED = 150;//过多久时间后刷新一次实时网速
private static final int DURATION_REFUSH_AVE_SPEED = 300;//过多久时间后刷新一次平均网速
private static final int DURATION_MAXCHECK = 5 * 1000;//整个测速过程允许的最大时间
private TextView tv_type, tv_now_speed, tv_ave_speed;
private DashboardView mDashboardView;
private Button btn;
private boolean flag = false;
private Handler handler = new StaticUiHandler(this);
private Disposable pingDisposable;
private long lastTotalRxBytes = 0;
private long lastTimeStamp = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_net);
tv_type = findViewById(R.id.connection_type);
tv_now_speed = findViewById(R.id.now_speed);
tv_ave_speed = findViewById(R.id.ave_speed);
btn = findViewById(R.id.start_btn);
mDashboardView = findViewById(R.id.dashboard_view);
btn.setOnClickListener(arg0 -> checkNetSpeed());
checkNetSpeed();
}
@Override
protected void onDestroy() {
super.onDestroy();
flag = false;
handler.removeCallbacksAndMessages(null);
if (pingDisposable != null) {
pingDisposable.dispose();
}
}
/**
* 监测网速
*/
private void checkNetSpeed() {
flag = true;
handler.postDelayed(this::reset, DURATION_MAXCHECK);
checkNetType();
btn.setText("正在ping百度ip...");
btn.setEnabled(false);
}
/**
* 监测网络类型
*/
private void checkNetType() {
//先ping一下百度看能不能通
pingDisposable = Observable.create(emitter -> emitter.onNext(PingUtils.pingIpAddress(PingUtils.BAIDU_IP, 2)))
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(isSuccess -> {
//通的话再检查是什么网，或者网络不可用
btn.setText("正在检查网络...");
if (isSuccess) {
ConnectivityManager manager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
if (manager != null) {
NetworkInfo networkInfo = manager.getActiveNetworkInfo();
if (networkInfo != null) {
tv_type.setText(networkInfo.getTypeName());//网络类型
btn.postDelayed(() -> btn.setText("正在测试网速..."), 500);
new DownloadThread(this).start();
} else {
onFailed("网络不可用");
}
} else {
onFailed("网络不可用");
}
//不同的话说明没网
} else {
onFailed("无网络");
}
});
}
private void onFailed(String tips) {
tv_type.setText(tips);
Toast.makeText(NetActivity.this, tips, Toast.LENGTH_SHORT).show();
reset();
}
/**
* 复原到初始状态
*/
private void reset() {
if (flag) {
flag = false;
btn.setText("重新测试");
btn.setEnabled(true);
handler.removeCallbacksAndMessages(null);
}
}
private void showCurrentNetSpeed() {
long nowTimeStamp = System.currentTimeMillis();
long totalRxBytes = TrafficStats.getTotalRxBytes();
if (TrafficStats.getUidRxBytes(getApplicationInfo().uid) != TrafficStats.UNSUPPORTED
&& totalRxBytes > lastTotalRxBytes && nowTimeStamp - lastTimeStamp > 0) {
int speed = (int) ((totalRxBytes - lastTotalRxBytes) * 1000 / (nowTimeStamp - lastTimeStamp));//毫秒转换成秒
lastTimeStamp = nowTimeStamp;
lastTotalRxBytes = TrafficStats.getTotalRxBytes();
tv_now_speed.setText(PingUtils.formatData(speed) + "/S");
Log.i("bqt", "当前网速：" + PingUtils.formatData(speed) + "/S");
mDashboardView.setRealTimeValue(speed * 1.0f / 1024 / 1024);
}
}
//region Handler
static class StaticUiHandler extends Handler {
private SoftReference<NetActivity> mSoftReference;
StaticUiHandler(NetActivity activity) {
mSoftReference = new SoftReference<>(activity);
}
@SuppressLint("SetTextI18n")
@Override
public void handleMessage(Message msg) {
NetActivity activity = mSoftReference.get();
if (activity != null && msg != null) {
switch (msg.what) {
case MESSAGE_WHAT_REFUSH_CURRENT_SPEED:
activity.showCurrentNetSpeed();
break;
case MESSAGE_WHAT_REFUSH_AVE_SPEED:
activity.tv_ave_speed.setText(PingUtils.formatData((int) msg.obj) + "/S");
break;
case MESSAGE_WHAT_REFUSH_RESET:
activity.reset();
break;
}
}
}
}
//endregion
//region 子线程
/**
* 下载资源，下载过程中，根据已下载长度、总长度、时间计算实时网速
*/
static class DownloadThread extends Thread {
private SoftReference<NetActivity> mSoftReference;
DownloadThread(NetActivity activity) {
mSoftReference = new SoftReference<>(activity);
}
@Override
public void run() {
try {
URLConnection connection = new URL(URL_DOWNLOAD).openConnection();
InputStream inputStream = connection.getInputStream();
Log.i("bqt", "总长度：" + PingUtils.formatData(connection.getContentLength()));
long startTime = System.currentTimeMillis();//开始时间
long usedTime;//已经使用的时长
long tempTime1 = 0, tempTime2 = 0;
int aveSpeed;//当前网速和平均网速
int temLen, downloadLen = 0;//已下载的长度
byte[] buf = new byte[1024];
NetActivity activity = mSoftReference.get();
while ((temLen = inputStream.read(buf)) != -1 && activity != null && activity.flag) {
usedTime = System.currentTimeMillis() - startTime;//毫秒
downloadLen += temLen;
//刷新当前网速
if (System.currentTimeMillis() - tempTime1 > DURATION_REFUSH_CURRENT_SPEED) {
tempTime1 = System.currentTimeMillis();
activity.handler.sendMessage(Message.obtain(activity.handler, MESSAGE_WHAT_REFUSH_CURRENT_SPEED, 0));
}
//刷新平均网速
if (System.currentTimeMillis() - tempTime2 > DURATION_REFUSH_AVE_SPEED) {
if (usedTime > 0) {//防止分母为零时报ArithmeticException
tempTime2 = System.currentTimeMillis();
aveSpeed = (int) (downloadLen / usedTime) * 1000;//平均网速，单位秒
activity.handler.sendMessage(Message.obtain(activity.handler, MESSAGE_WHAT_REFUSH_AVE_SPEED, aveSpeed));
Log.i("bqt", "平均网速：" + PingUtils.formatData(aveSpeed) + "/S 已下载长度：" + PingUtils.formatData(downloadLen));
}
}
}
//重置
if (activity != null) {
activity.handler.sendMessage(Message.obtain(activity.handler, MESSAGE_WHAT_REFUSH_RESET));
}
inputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
//endregion
}
布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#800F"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#000"
android:orientation="horizontal"
android:paddingTop="10dp"
android:paddingBottom="10dp">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:text="连接方式"
android:textColor="#ffffff"/>
<TextView
android:id="@+id/connection_type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:singleLine="true"
android:textColor="#fff"
tools:text="2M/S"/>
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#dbdbdb"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="当前速度"
android:textColor="#ffffff"/>
<TextView
android:id="@+id/now_speed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:textColor="#fff"
tools:text="2M/S"/>
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#dbdbdb"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="平均速度"
android:textColor="#ffffff"/>
<TextView
android:id="@+id/ave_speed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:textColor="#fff"
tools:text="2M/S"/>
</LinearLayout>
</LinearLayout>
<rx.test.bqt.com.rxjavademo.net.DashboardView
android:id="@+id/dashboard_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"/>
<Button
android:id="@+id/start_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="开始测试"/>
</LinearLayout>
工具方法
public class PingUtils {
public static final String BAIDU_IP = "119.75.217.109";
public static final String APPLE_IP = "http://captive.apple.com";
/**
* 格式化文件大小
*
* @param size 文件大小
*/
public static String formatData(long size) {
DecimalFormat formater = new DecimalFormat("####.00");
if (size < 1024) return size + "B";
else if (size < Math.pow(1024, 2)) return formater.format(size * Math.pow(1024, -1)) + "KB";
else if (size < Math.pow(1024, 3)) return formater.format(size * Math.pow(1024, -2)) + "MB";
else if (size < Math.pow(1024, 4)) return formater.format(size * Math.pow(1024, -3)) + "GB";
else return "";
}
/**
* ping返回true表示ping通，false表示没有ping通
* 所谓没有ping通是指数据包没有返回，也就是客户端没有及时收到ping的返回包因此返回false
* 但是要是网络不可用则ping的时候也会返回true，因为ping指定有成功结束，只是ping的返回包是失败的数据包而不是成功的数据包
* 所以准确的说返回true表示ping指定返回完成，false表示没收到ping的返回数据
* 以上方法是阻塞的，android系统默认等待ping的超时是10s，可以自定义超时时间
* 也不用担心方法一直被阻塞，如果ping超时就会自动返回，不必担心方法被阻塞导致无法运行下面的代码
* 网上的一些ping的实现说方法会被一直阻塞，实际上是他们ping的命令没写好，以及使用io被阻塞了
*/
public static boolean ping(String host, int pingCount) {
Process process = null;
BufferedReader successReader = null;
//String command = "/system/bin/ping -c " + pingCount + " -w 5 " + host;//-c 是指ping的次数，-w是指超时时间，单位为s。
String command = "ping -c " + pingCount + " " + host;
boolean isSuccess = false;
try {
Log.i("bqt", "【start ping，command：" + command + "】");
process = Runtime.getRuntime().exec(command);
if (process == null) {
Log.i("bqt", "【ping fail：process is null.】");
return false;
}
successReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while ((line = successReader.readLine()) != null) {
Log.i("bqt", line);
}
int status = process.waitFor();
if (status == 0) {
Log.i("bqt", "【exec cmd success】");
isSuccess = true;
} else {
Log.i("bqt", "【exec cmd fail】");
isSuccess = false;
}
Log.i("bqt", "【exec finished】");
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
Log.i("bqt", "【ping exit】");
if (process != null) {
process.destroy();
}
if (successReader != null) {
try {
successReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return isSuccess;
}
/**
* 简易版
*/
public static boolean pingIpAddress(String host, int pingCount) {
try {
String command = "ping -c " + pingCount + " -w 5 " + host;//-c 是指ping的次数，-w是指超时时间，单位为s。
Log.i("bqt", "【start ping，command：" + command + "】");
Process process = Runtime.getRuntime().exec(command);
//其中参数-c 1是指ping的次数为1次，-w是指超时时间单位为s。
boolean isSuccess = process != null && process.waitFor() == 0;//status 等于0的时候表示网络可用，status等于2时表示当前网络不可用
Log.i("bqt", "【end ping，isSuccess：" + isSuccess + "】");
return isSuccess;
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
return false;
}
}
自定义View
public class DashboardView extends View {
private static final long ANIMATION_DURATION = 130; //动画时长，注意最好不要在一个动画周期内设置多个动画
private static final int M_START_ANGLE = 135; // 起始角度
private static final int M_SWEEP_ANGLE = 270; // 绘制角度
private static final float mMin = 0; // 最小值
private static final float mMax = 5; // 最大值，对应5MB/S
private static final int M_SECTION = 10; // 值域（mMax-mMin）等分份数
private static final int M_PORTION = 10; // 一个mSection等分份数
private static final String M_HEADER_TEXT = "MB/S"; // 表头
private static final int SWEEP_ANGLE_COLOR = 0x880000ff;//圆弧颜色
private static final int REAL_TIME_VALUE_COLOR = 0xffff0000;//实时读数的颜色
private static final boolean IS_SHOW_VALUE = true; // 是否显示实时读数
private int mRadius; // 扇形半径
private float realTimeValue = mMin; // 实时读数
private int mStrokeWidth; // 画笔宽度
private int mLength1; // 长刻度的相对圆弧的长度
private int mLength2; // 刻度读数顶部的相对圆弧的长度
private int mPLRadius; // 指针长半径
private int mPSRadius; // 指针短半径
private int mPadding;
private float mCenterX, mCenterY; // 圆心坐标
private Paint mPaint;
private RectF mRectFArc;
private Path mPath;
private RectF mRectFInnerArc;
private Rect mRectText;
private String[] mTexts;
public DashboardView(Context context) {
this(context, null);
}
public DashboardView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DashboardView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
mStrokeWidth = dp2px(1);
mLength1 = dp2px(8) + mStrokeWidth;
mLength2 = mLength1 + dp2px(2);
mPSRadius = dp2px(10);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mRectFArc = new RectF();
mPath = new Path();
mRectFInnerArc = new RectF();
mRectText = new Rect();
mTexts = new String[M_SECTION + 1]; // 需要显示mSection + 1个刻度读数
for (int i = 0; i < mTexts.length; i++) {
float n = (mMax - mMin) / M_SECTION;
mTexts[i] = String.valueOf(mMin + i * n);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
mPadding = Math.max(
Math.max(getPaddingLeft(), getPaddingTop()),
Math.max(getPaddingRight(), getPaddingBottom())
);
setPadding(mPadding, mPadding, mPadding, mPadding);
int width = resolveSize(dp2px(200), widthMeasureSpec);
mRadius = (width - mPadding * 2 - mStrokeWidth * 2) / 2;
mPaint.setTextSize(sp2px(16));
if (IS_SHOW_VALUE) { // 显示实时读数，View高度增加字体高度3倍
mPaint.getTextBounds("0", 0, "0".length(), mRectText);
} else {
mPaint.getTextBounds("0", 0, 0, mRectText);
}
// 由半径+指针短半径+实时读数文字高度确定的高度
int height1 = mRadius + mStrokeWidth * 2 + mPSRadius + mRectText.height() * 3;
// 由起始角度确定的高度
float[] point1 = getCoordinatePoint(mRadius, M_START_ANGLE);
// 由结束角度确定的高度
float[] point2 = getCoordinatePoint(mRadius, M_START_ANGLE + M_SWEEP_ANGLE);
// 取最大值
int max = (int) Math.max(height1, Math.max(point1[1] + mRadius + mStrokeWidth * 2, point2[1] + mRadius + mStrokeWidth * 2));
setMeasuredDimension(width, max + getPaddingTop() + getPaddingBottom());
mCenterX = mCenterY = getMeasuredWidth() / 2f;
mRectFArc.set(getPaddingLeft() + mStrokeWidth,
getPaddingTop() + mStrokeWidth,
getMeasuredWidth() - getPaddingRight() - mStrokeWidth,
getMeasuredWidth() - getPaddingBottom() - mStrokeWidth);
mPaint.setTextSize(sp2px(10));
mPaint.getTextBounds("0", 0, "0".length(), mRectText);
mRectFInnerArc.set(getPaddingLeft() + mLength2 + mRectText.height(),
getPaddingTop() + mLength2 + mRectText.height(),
getMeasuredWidth() - getPaddingRight() - mLength2 - mRectText.height(),
getMeasuredWidth() - getPaddingBottom() - mLength2 - mRectText.height());
mPLRadius = mRadius - (mLength2 + mRectText.height() + dp2px(5));
}
private float tempRealTimeValue;
private int dp2px(int dp) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,
Resources.getSystem().getDisplayMetrics());
}
private int sp2px(int sp) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, sp,
Resources.getSystem().getDisplayMetrics());
}
public float[] getCoordinatePoint(int radius, float angle) {
float[] point = new float[2];
double arcAngle = Math.toRadians(angle); //将角度转换为弧度
if (angle < 90) {
point[0] = (float) (mCenterX + Math.cos(arcAngle) * radius);
point[1] = (float) (mCenterY + Math.sin(arcAngle) * radius);
} else if (angle == 90) {
point[0] = mCenterX;
point[1] = mCenterY + radius;
} else if (angle > 90 && angle < 180) {
arcAngle = Math.PI * (180 - angle) / 180.0;
point[0] = (float) (mCenterX - Math.cos(arcAngle) * radius);
point[1] = (float) (mCenterY + Math.sin(arcAngle) * radius);
} else if (angle == 180) {
point[0] = mCenterX - radius;
point[1] = mCenterY;
} else if (angle > 180 && angle < 270) {
arcAngle = Math.PI * (angle - 180) / 180.0;
point[0] = (float) (mCenterX - Math.cos(arcAngle) * radius);
point[1] = (float) (mCenterY - Math.sin(arcAngle) * radius);
} else if (angle == 270) {
point[0] = mCenterX;
point[1] = mCenterY - radius;
} else {
arcAngle = Math.PI * (360 - angle) / 180.0;
point[0] = (float) (mCenterX + Math.cos(arcAngle) * radius);
point[1] = (float) (mCenterY - Math.sin(arcAngle) * radius);
}
return point;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//画圆弧
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(mStrokeWidth);
mPaint.setColor(SWEEP_ANGLE_COLOR);
canvas.drawArc(mRectFArc, M_START_ANGLE, M_SWEEP_ANGLE, false, mPaint);
//画长刻度。画好起始角度的一条刻度后通过canvas绕着原点旋转来画剩下的长刻度
double cos = Math.cos(Math.toRadians(M_START_ANGLE - 180));
double sin = Math.sin(Math.toRadians(M_START_ANGLE - 180));
float x0 = (float) (mPadding + mStrokeWidth + mRadius * (1 - cos));
float y0 = (float) (mPadding + mStrokeWidth + mRadius * (1 - sin));
float x1 = (float) (mPadding + mStrokeWidth + mRadius - (mRadius - mLength1) * cos);
float y1 = (float) (mPadding + mStrokeWidth + mRadius - (mRadius - mLength1) * sin);
canvas.save();
canvas.drawLine(x0, y0, x1, y1, mPaint);
float angle = M_SWEEP_ANGLE * 1f / M_SECTION;
for (int i = 0; i < M_SECTION; i++) {
canvas.rotate(angle, mCenterX, mCenterY);
canvas.drawLine(x0, y0, x1, y1, mPaint);
}
canvas.restore();
//画短刻度。同样采用canvas的旋转原理
canvas.save();
mPaint.setStrokeWidth(1);
float x2 = (float) (mPadding + mStrokeWidth + mRadius - (mRadius - mLength1 / 2f) * cos);
float y2 = (float) (mPadding + mStrokeWidth + mRadius - (mRadius - mLength1 / 2f) * sin);
canvas.drawLine(x0, y0, x2, y2, mPaint);
angle = M_SWEEP_ANGLE * 1f / (M_SECTION * M_PORTION);
for (int i = 1; i < M_SECTION * M_PORTION; i++) {
canvas.rotate(angle, mCenterX, mCenterY);
if (i % M_PORTION == 0) { // 避免与长刻度画重合
continue;
}
canvas.drawLine(x0, y0, x2, y2, mPaint);
}
canvas.restore();
//画长刻度读数。添加一个圆弧path，文字沿着path绘制
mPaint.setTextSize(sp2px(10));
mPaint.setTextAlign(Paint.Align.LEFT);
mPaint.setStyle(Paint.Style.FILL);
for (int i = 0; i < mTexts.length; i++) {
mPaint.getTextBounds(mTexts[i], 0, mTexts[i].length(), mRectText);
// 粗略把文字的宽度视为圆心角2*θ对应的弧长，利用弧长公式得到θ，下面用于修正角度
float degree = (float) (180 * mRectText.width() / 2 /
(Math.PI * (mRadius - mLength2 - mRectText.height())));
mPath.reset();
mPath.addArc(mRectFInnerArc,
M_START_ANGLE + i * (M_SWEEP_ANGLE / M_SECTION) - degree, // 正起始角度减去θ使文字居中对准长刻度
M_SWEEP_ANGLE);
canvas.drawTextOnPath(mTexts[i], mPath, 0, 0, mPaint);
}
//画表头。没有表头就不画
if (!TextUtils.isEmpty(M_HEADER_TEXT)) {
mPaint.setTextSize(sp2px(14));
mPaint.setTextAlign(Paint.Align.CENTER);
mPaint.getTextBounds(M_HEADER_TEXT, 0, M_HEADER_TEXT.length(), mRectText);
canvas.drawText(M_HEADER_TEXT, mCenterX, mCenterY / 2f + mRectText.height(), mPaint);
}
//画指针
float degree = M_START_ANGLE + M_SWEEP_ANGLE * (realTimeValue - mMin) / (mMax - mMin); // 指针与水平线夹角
int d = dp2px(5); // 指针由两个等腰三角形构成，d为共底边长的一半
mPath.reset();
float[] p1 = getCoordinatePoint(d, degree - 90);
mPath.moveTo(p1[0], p1[1]);
float[] p2 = getCoordinatePoint(mPLRadius, degree);
mPath.lineTo(p2[0], p2[1]);
float[] p3 = getCoordinatePoint(d, degree + 90);
mPath.lineTo(p3[0], p3[1]);
float[] p4 = getCoordinatePoint(mPSRadius, degree - 180);
mPath.lineTo(p4[0], p4[1]);
mPath.close();
canvas.drawPath(mPath, mPaint);
//画指针围绕的镂空圆心
mPaint.setColor(Color.WHITE);
canvas.drawCircle(mCenterX, mCenterY, dp2px(2), mPaint);
//画实时度数值
if (IS_SHOW_VALUE) {
mPaint.setTextSize(sp2px(18));
mPaint.setTextAlign(Paint.Align.CENTER);
mPaint.setColor(REAL_TIME_VALUE_COLOR);
String value = String.format(Locale.getDefault(), "%.2f", realTimeValue) /*+ " MB/S"*/;
mPaint.getTextBounds(value, 0, value.length(), mRectText);
canvas.drawText(value, mCenterX, mCenterY + mPSRadius + mRectText.height() * 2, mPaint);
}
}
public float getRealTimeValue() {
return realTimeValue;
}
public void setRealTimeValue(final float value) {
if (this.realTimeValue == value || value < mMin || value > mMax) {
return;
}
this.tempRealTimeValue = this.realTimeValue;
Animation anim = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
//开始动画以后applyTransformation函数会自动调用，这里的interpolatedTime是 0-1 区间的变量，反映动画的进度
super.applyTransformation(interpolatedTime, t);
realTimeValue = tempRealTimeValue + interpolatedTime * (value - tempRealTimeValue);
Log.i("bqt", "interpolatedTime=" + interpolatedTime + " realTimeValue=" + realTimeValue);
postInvalidate();
}
};
anim.setDuration(ANIMATION_DURATION);
this.startAnimation(anim);
//不知为什么不能用下面这种动画，感觉应该也是可以的
/*ObjectAnimator anim = ObjectAnimator.ofFloat(this, "realTimeValue", value)
.setDuration(ANIMATION_DURATION);
anim.addUpdateListener(animation -> {
realTimeValue = (Float) animation.getAnimatedValue();
Log.i("bqt", "realTimeValue=" + realTimeValue);
postInvalidate();
});
anim.start();*/
}
}
自定义View2
public class DashboardView2 extends View {
private static final long ANIMATION_DURATION = 130; //动画时长，注意最好不要在一个动画周期内设置多个动画
private static final int M_START_ANGLE = 135; // 起始角度
private static final int M_SWEEP_ANGLE = 270; // 绘制角度
private static final float M_MIN = 0; // 最小值
private static final float M_MAX = 5; // 最大值，对应5MB/S
private static final int M_SECTION = 10; // 值域（M_MAX-M_MIN）等分份数，对应1-5M/S
private static final int M_PORTION = 5; // 一个mSection等分份数
private static final int DEFAULT_ANGLE_COLOR = 0x22000000;//默认圆弧颜色
private static final int CURRENT_ANGLE_COLOR = 0x8800ffff;//已达到部分圆弧颜色
private static final int DEFAULT_TEXT_COLOR = 0xaa000000;//文字颜色
private static final int STROKE_TEXT_WIDTH_SP1 = 12;//刻度读数文字大小，sp单位
private String mHeaderText = ""; // 表头文字
private static final int STROKE_TEXT_WIDTH_SP2 = 16;//表头文字大小，sp单位
private static final boolean IS_SHOW_VALUE = true; // 是否显示实时读数
private static final int STROKE_TEXT_WIDTH_SP3 = 13;//实时度数值文字大小，sp单位
private static final int STROKE_WIDTH_DP = 2;//圆弧画笔宽度，刻度宽，dp单位
private static final int M_LENGTH_1_DP = 22; // 短刻度的相对圆弧的长度，dp单位
private static final int M_LENGTH_2_DP = 30; // 长刻度的相对圆弧的长度，dp单位
private static final int M_LENGTH_3_DP = 42; // 刻度读数顶部的相对圆弧的长度
private int mRadius; // 扇形半径
private float realTimeValue = 0; // 实时读数
private int mPadding;
private float mCenterX, mCenterY; // 圆心坐标
private Paint mPaint;
private RectF mRectFArc;
private Path mPath;
private RectF mRectFInnerArc;
private Rect mRectText;
private String[] mTexts;
public DashboardView2(Context context) {
this(context, null);
}
public DashboardView2(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DashboardView2(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int mStrokeWidth = dp2px(STROKE_WIDTH_DP);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(mStrokeWidth);
mPaint.setColor(CURRENT_ANGLE_COLOR);
float degree = M_SWEEP_ANGLE * (realTimeValue - M_MIN) / (M_MAX - M_MIN); // 指针与水平线夹角
//画圆弧
/*canvas.drawArc(mRectFArc, M_START_ANGLE, M_SWEEP_ANGLE, false, mPaint);*/
//画长刻度。画好起始角度的一条刻度后通过canvas绕着原点旋转来画剩下的长刻度
double cos = Math.cos(Math.toRadians(M_START_ANGLE - 180));
double sin = Math.sin(Math.toRadians(M_START_ANGLE - 180));
float x0 = (float) (mPadding + mStrokeWidth + mRadius * (1 - cos));
float y0 = (float) (mPadding + mStrokeWidth + mRadius * (1 - sin));
float x1 = (float) (mPadding + mStrokeWidth + mRadius - (mRadius - dp2px(M_LENGTH_2_DP)) * cos);
float y1 = (float) (mPadding + mStrokeWidth + mRadius - (mRadius - dp2px(M_LENGTH_2_DP)) * sin);
canvas.save();
canvas.drawLine(x0, y0, x1, y1, mPaint);
float angle = M_SWEEP_ANGLE * 1f / M_SECTION;
//int tem = (int) (degree / M_SECTION);
int tem = (int) (degree / angle);
Log.i("bqt", "degree=" + degree + " tem=" + tem);
for (int i = 0; i < M_SECTION; i++) {
if (i < tem) {
mPaint.setColor(CURRENT_ANGLE_COLOR);
} else {
mPaint.setColor(DEFAULT_ANGLE_COLOR);
}
canvas.rotate(angle, mCenterX, mCenterY);
canvas.drawLine(x0, y0, x1, y1, mPaint);
}
canvas.restore();
//画短刻度。同样采用canvas的旋转原理
canvas.save();
float x2 = (float) (mPadding + mStrokeWidth + mRadius - (mRadius - dp2px(M_LENGTH_1_DP)) * cos);
float y2 = (float) (mPadding + mStrokeWidth + mRadius - (mRadius - dp2px(M_LENGTH_1_DP)) * sin);
//canvas.drawLine(x0, y0, x2, y2, mPaint);
angle = M_SWEEP_ANGLE * 1f / (M_SECTION * M_PORTION);
tem = (int) (degree / angle);
for (int i = 1; i < M_SECTION * M_PORTION; i++) {
canvas.rotate(angle, mCenterX, mCenterY);
if (i % M_PORTION == 0) { // 避免与长刻度画重合
continue;
}
if (i < tem) {
mPaint.setColor(CURRENT_ANGLE_COLOR);
} else {
mPaint.setColor(DEFAULT_ANGLE_COLOR);
}
canvas.drawLine(x0, y0, x2, y2, mPaint);
}
canvas.restore();
//画长刻度读数。添加一个圆弧path，文字沿着path绘制
mPaint.setColor(DEFAULT_TEXT_COLOR);
mPaint.setTextSize(sp2px(STROKE_TEXT_WIDTH_SP1));
mPaint.setTextAlign(Paint.Align.LEFT);
mPaint.setStyle(Paint.Style.FILL);
for (int i = 0; i < mTexts.length; i++) {
mPaint.getTextBounds(mTexts[i], 0, mTexts[i].length(), mRectText);
// 粗略把文字的宽度视为圆心角2*θ对应的弧长，利用弧长公式得到θ，下面用于修正角度
float tempDegree = (float) (180 * mRectText.width() / 2 /
(Math.PI * (mRadius - dp2px(M_LENGTH_3_DP) - mRectText.height())));
mPath.reset();
mPath.addArc(mRectFInnerArc,
M_START_ANGLE + i * (M_SWEEP_ANGLE / M_SECTION) - tempDegree, // 正起始角度减去θ使文字居中对准长刻度
M_SWEEP_ANGLE);
canvas.drawTextOnPath(mTexts[i], mPath, 0, 0, mPaint);
}
//画表头。没有表头就不画
if (!TextUtils.isEmpty(mHeaderText)) {
mPaint.setTextSize(sp2px(STROKE_TEXT_WIDTH_SP2));
mPaint.setTextAlign(Paint.Align.CENTER);
mPaint.getTextBounds(mHeaderText, 0, mHeaderText.length(), mRectText);
canvas.drawText(mHeaderText, mCenterX, mCenterY, mPaint);
}
//画实时度数值
if (IS_SHOW_VALUE) {
mPaint.setTextSize(sp2px(STROKE_TEXT_WIDTH_SP3));
mPaint.setTextAlign(Paint.Align.CENTER);
String value = String.format(Locale.getDefault(), "%.2f", realTimeValue) + " MB/S";
mPaint.getTextBounds(value, 0, value.length(), mRectText);
canvas.drawText(value, mCenterX, mCenterY + mRectText.height() * 2, mPaint);
}
}
private void init() {
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mRectFArc = new RectF();
mPath = new Path();
mRectFInnerArc = new RectF();
mRectText = new Rect();
mTexts = new String[M_SECTION + 1]; // 需要显示mSection + 1个刻度读数
for (int i = 0; i < mTexts.length; i++) {
float n = (M_MAX - M_MIN) / M_SECTION;
mTexts[i] = String.valueOf(M_MIN + i * n);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int mStrokeWidth = dp2px(STROKE_WIDTH_DP);
mPadding = Math.max(Math.max(getPaddingLeft(), getPaddingTop()),
Math.max(getPaddingRight(), getPaddingBottom()));
setPadding(mPadding, mPadding, mPadding, mPadding);
int width = resolveSize(dp2px(200), widthMeasureSpec);
mRadius = (width - mPadding * 2 - mStrokeWidth * 2) / 2;
mPaint.setTextSize(sp2px(16));
if (IS_SHOW_VALUE) { // 显示实时读数，View高度增加字体高度3倍
mPaint.getTextBounds("0", 0, "0".length(), mRectText);
} else {
mPaint.getTextBounds("0", 0, 0, mRectText);
}
// 由半径+指针短半径+实时读数文字高度确定的高度
int height1 = mRadius + mStrokeWidth * 2 + mRectText.height() * 3;
// 由起始角度确定的高度
float[] point1 = getCoordinatePoint(mRadius, M_START_ANGLE);
// 由结束角度确定的高度
float[] point2 = getCoordinatePoint(mRadius, M_START_ANGLE + M_SWEEP_ANGLE);
// 取最大值
int max = (int) Math.max(height1, Math.max(point1[1] + mRadius + mStrokeWidth * 2, point2[1] + mRadius + mStrokeWidth * 2));
setMeasuredDimension(width, max + getPaddingTop() + getPaddingBottom());
mCenterX = mCenterY = getMeasuredWidth() / 2f;
mRectFArc.set(getPaddingLeft() + mStrokeWidth,
getPaddingTop() + mStrokeWidth,
getMeasuredWidth() - getPaddingRight() - mStrokeWidth,
getMeasuredWidth() - getPaddingBottom() - mStrokeWidth);
mPaint.setTextSize(sp2px(10));
mPaint.getTextBounds("0", 0, "0".length(), mRectText);
mRectFInnerArc.set(getPaddingLeft() + dp2px(M_LENGTH_3_DP) + mRectText.height(),
getPaddingTop() + dp2px(M_LENGTH_3_DP) + mRectText.height(),
getMeasuredWidth() - getPaddingRight() - dp2px(M_LENGTH_3_DP) - mRectText.height(),
getMeasuredWidth() - getPaddingBottom() - dp2px(M_LENGTH_3_DP) - mRectText.height());
}
private float tempRealTimeValue;
private int dp2px(int dp) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, Resources.getSystem().getDisplayMetrics());
}
private int sp2px(int sp) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, sp, Resources.getSystem().getDisplayMetrics());
}
public float[] getCoordinatePoint(int radius, float angle) {
float[] point = new float[2];
double arcAngle = Math.toRadians(angle); //将角度转换为弧度
if (angle < 90) {
point[0] = (float) (mCenterX + Math.cos(arcAngle) * radius);
point[1] = (float) (mCenterY + Math.sin(arcAngle) * radius);
} else if (angle == 90) {
point[0] = mCenterX;
point[1] = mCenterY + radius;
} else if (angle > 90 && angle < 180) {
arcAngle = Math.PI * (180 - angle) / 180.0;
point[0] = (float) (mCenterX - Math.cos(arcAngle) * radius);
point[1] = (float) (mCenterY + Math.sin(arcAngle) * radius);
} else if (angle == 180) {
point[0] = mCenterX - radius;
point[1] = mCenterY;
} else if (angle > 180 && angle < 270) {
arcAngle = Math.PI * (angle - 180) / 180.0;
point[0] = (float) (mCenterX - Math.cos(arcAngle) * radius);
point[1] = (float) (mCenterY - Math.sin(arcAngle) * radius);
} else if (angle == 270) {
point[0] = mCenterX;
point[1] = mCenterY - radius;
} else {
arcAngle = Math.PI * (360 - angle) / 180.0;
point[0] = (float) (mCenterX + Math.cos(arcAngle) * radius);
point[1] = (float) (mCenterY - Math.sin(arcAngle) * radius);
}
return point;
}
public void setHeaderText(String mHeaderText) {
this.mHeaderText = mHeaderText;
}
public void setRealTimeValue(final float value) {
this.realTimeValue = value;
postInvalidate();
}
public void setRealTimeValueWithAnimation(final float value) {
if (this.realTimeValue == value || value < M_MIN || value > M_MAX) {
return;
}
this.tempRealTimeValue = this.realTimeValue;
Animation anim = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
//开始动画以后applyTransformation函数会自动调用，这里的interpolatedTime是 0-1 区间的变量，反映动画的进度
super.applyTransformation(interpolatedTime, t);
realTimeValue = tempRealTimeValue + interpolatedTime * (value - tempRealTimeValue);
//Log.i("bqt", "interpolatedTime=" + interpolatedTime + " realTimeValue=" + realTimeValue);
postInvalidate();
}
};
anim.setDuration(ANIMATION_DURATION);
this.startAnimation(anim);
}
}
2018-4-8
本文来自博客园，作者：白乾涛，转载请注明原文链接：https://www.cnblogs.com/baiqiantao/p/8744578.html
