安卓app_sl4_2水平进度条与圆形进度条_与线程的启动

安卓app_sl4_2水平进度条与圆形进度条_与线程的启动

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.sl4_2.MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="42dp" />

    <ProgressBar
        android:id="@+id/progressBar2"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/progressBar1"
        android:layout_marginTop="28dp" />

</RelativeLayout>

package com.example.sl4_2;



import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

public class MainActivity extends Activity {
    private ProgressBar horizonP;
    private ProgressBar circleP;
    private int mProgressStatus = 0;
    private Handler mHandler;//声明一个用于处理消息的Handler类的对象
    
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        horizonP=(ProgressBar) findViewById(R.id.progressBar1);
        circleP = (ProgressBar) findViewById(R.id.progressBar2);
        mHandler=new Handler(){
            @Override
              public void handleMessage(Message msg)
            {
                    if(msg.what==0x111)
                    {
                        horizonP.setProgress(mProgressStatus);
                        circleP.setProgress(100-mProgressStatus);
                    }
                    else
                    {
                        Toast.makeText(MainActivity.this, "耗时操作已经完成",Toast.LENGTH_SHORT).show();
                        horizonP.setVisibility(View.GONE);
                        circleP.setVisibility(View.GONE);;
                    }
        
            }

            };
            new Thread(new Runnable()
            {
                public void run()
                {
                    while(true)
                    {
                        mProgressStatus=doWork();
                        Message m=new Message();
                        if(mProgressStatus<100)
                        {
                            m.what=0x111;
                            mHandler.sendMessage(m);
                        }
                        else
                        {
                            m.what=0x110;
                            mHandler.sendMessage(m);
                            break;
                        }
                    }
                }
                private int doWork()
                {
                    mProgressStatus+=Math.random()*10;
                    try
                    {
                        Thread.sleep(200);
                    }
                    catch(InterruptedException e)
                    {
                        e.printStackTrace();
                    }
                    return mProgressStatus;
                }
                
            }).start();
    }
                


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}