Android 基于帧布局实现一个进度条 FrameLayout+ProgressBar

<ProgressBar
android:layout_gravity="center"
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:layout_gravity="center"
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0%" />

package com.example.runprogressbar;

import java.util.Timer;
import java.util.TimerTask;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.ActionBarActivity;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

private TextView textView;

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

textView = (TextView) findViewById(R.id.textView1);
new Thread(new MyThread()).start();
}

Handler handler = new Handler() {
public void handleMessage(Message msg) {
textView.setText(msg.what + "%");
}
};

class MyThread implements Runnable {

private int percentNum = 0;

@Override
public void run() {
while (true) {
try {
Thread.sleep(1000);
Message msg = new Message();
msg.what = ++percentNum;
handler.sendMessage(msg);
if (percentNum >= 100)
break;
} catch (InterruptedException e) {
e.printStackTrace();
}

}
}

}
}