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874天前1.Mainactivity.java |
package com.example.acer.myapplication; |
import android.os.Bundle; |
import android.app.Activity; |
import android.widget.ProgressBar; |
public class MainActivity extends Activity { |
private int[] randData = new int[100]; |
private int index = 0; |
@Override |
protected void onCreate(Bundle savedInstanceState) { |
super.onCreate(savedInstanceState); |
setContentView(R.layout.activity_main); |
final ProgressBar bar = (ProgressBar)findViewById(R.id.bar); |
new Thread() { |
@Override |
public void run() { |
super.run(); |
while(index < 100) { |
doWork(); |
bar.setProgress(index); |
} |
} |
}.start(); |
} |
private int doWork() { |
randData[index++] = (int)(Math.random() * 100); |
//模拟一个比较耗时的操作 |
try { |
Thread.sleep(100); |
} catch (InterruptedException e) { |
e.printStackTrace(); |
} |
return index; |
} |
} |
2.activity_main.xml |
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" |
xmlns:tools="http://schemas.android.com/tools" |
android:orientation="vertical" |
android:layout_width="match_parent" |
android:layout_height="match_parent" > |
<TextView |
android:layout_width="match_parent" |
android:layout_height="wrap_content" |
android:text="@string/hello_world" |
/> |
<ProgressBar |
android:id="@+id/bar" |
android:layout_width="match_parent" |
android:layout_height="wrap_content" |
android:max="100" |
style="@android:style/Widget.ProgressBar.Horizontal" |
/> |
</LinearLayout> |
