每日总结 3.5

今天学习了页面显示和闹钟的设定。

使用list view显示数据。闹钟仍在研究中。

public class MainActivity extends AppCompatActivity {

    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RadioButton rbYes = findViewById(R.id.rb_yes);
        RadioButton rbNo = findViewById(R.id.rb_no);
        rbYes.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                startRemind();
            }
        });
        rbNo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                stopRemind();
            }
        });
    }
    /**
     * 开启提醒
     */
    private void startRemind(){

        //得到日历实例,主要是为了下面的获取时间
        Calendar mCalendar = Calendar.getInstance();
        mCalendar.setTimeInMillis(System.currentTimeMillis());

        //获取当前毫秒值
        long systemTime = System.currentTimeMillis();

        //是设置日历的时间,主要是让日历的年月日和当前同步
        mCalendar.setTimeInMillis(System.currentTimeMillis());
        // 这里时区需要设置一下,不然可能个别手机会有8个小时的时间差
        mCalendar.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        //设置在几点提醒  设置的为点
        mCalendar.set(Calendar.HOUR_OF_DAY, 14);
        //设置在几分提醒  设置的为分
        mCalendar.set(Calendar.MINUTE, 46);
        //下面这两个看字面意思也知道
        mCalendar.set(Calendar.SECOND, 0);
        mCalendar.set(Calendar.MILLISECOND, 0);

        //上面设置的就是13点25分的时间点

        //获取上面设置的13点25分的毫秒值
        long selectTime = mCalendar.getTimeInMillis();

        // 如果当前时间大于设置的时间,那么就从第二天的设定时间开始
        if(systemTime > selectTime) {
            mCalendar.add(Calendar.DAY_OF_MONTH, 1);
        }

        //AlarmReceiver.class为广播接受者
        Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
        PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
        //得到AlarmManager实例
        AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);

        //**********注意!!下面的两个根据实际需求任选其一即可*********

        /**
         * 单次提醒
         * mCalendar.getTimeInMillis() 上面设置的13点25分的时间点毫秒值
         */
        am.set(AlarmManager.RTC_WAKEUP, mCalendar.getTimeInMillis(), pi);

        /**
         * 重复提醒
         * 第一个参数是警报类型;下面有介绍
         * 第二个参数网上说法不一,很多都是说的是延迟多少毫秒执行这个闹钟,但是我用的刷了MIUI的三星手机的实际效果是与单次提醒的参数一样,即设置的13点25分的时间点毫秒值
         * 第三个参数是重复周期,也就是下次提醒的间隔 毫秒值 我这里是一天后提醒
         */
        am.setRepeating(AlarmManager.RTC_WAKEUP, mCalendar.getTimeInMillis(), (1000 * 60 ), pi);

    }


    /**
     * 关闭提醒
     */
    private void stopRemind(){

        Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
        PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, 0,
                intent, 0);
        AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
        //取消警报
        am.cancel(pi);
        Toast.makeText(this, "关闭了提醒", Toast.LENGTH_SHORT).show();

    }

页面显示:

public class Seesome extends AppCompatActivity {
    private SimpleCursorAdapter mAdapter;
    private ListView listView;

    private Button btn_add;
    private Button btn_delete;

    private Button btn_back;
    private EditText et_date;
    private EditText et_gj;
    private EditText et_zj;
    private EditText et_jc;
    private EditText et_max;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_seesome);

        btn_add = (Button) findViewById(R.id.btn_add);
        btn_delete = (Button) findViewById(R.id.btn_delete);
        listView = (ListView) findViewById(R.id.list);

        btn_add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                addData();
                refleshListView();
            }
        });

        btn_delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                deleteData();
                refleshListView();
            }
        });

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//                Toast.makeText(MainActivity.this,""+position,Toast.LENGTH_SHORT).show();
                int positions = position + 1;
                Help db = new Help(Seesome.this);
                SQLiteDatabase dbWrite = db.getWritableDatabase();
                dbWrite.delete("daka","_id=?",new String[]{""+positions});
                dbWrite.close();
                refleshListView();
            }
        });
    }
<?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:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btn_add"
        android:text="显示信息"
        android:textSize="20sp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/btn_delete"
        android:text="删除所有"
        android:textSize="20sp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/main_top"
        android:padding="10dp"
        android:divider="@null"
        android:dividerHeight="6dp"
        android:scrollbars="none"
        android:background="@color/hui"/>

    <Button
        android:id="@+id/btn_back"
        android:text="确定"
        android:textSize="20sp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <TextView
        android:id="@+id/tv_expense_date"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="20sp"
        android:padding="10dp"></TextView>
    <TextView
        android:id="@+id/tv_expense_gj"
        android:layout_width="70dp"
        android:layout_height="35dp"
        android:textSize="20sp"></TextView>
</LinearLayout>

 

posted @ 2023-03-05 15:34  一个小虎牙  阅读(15)  评论(0编辑  收藏  举报