ProgressBar

1、String.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, ProgressBar test!</string>
    <string name="app_name">Activity08</string>
</resources>

 

2、main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <ProgressBar
        android:id="@+id/firstBar"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:visibility="gone" />

    <ProgressBar
        android:id="@+id/secondBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone" />

    <Button
        android:id="@+id/b"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Begin" />

</LinearLayout>

 

3、Activity.java

package mars.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;

public class Activity08 extends Activity {
	/** Called when the activity is first created. */

	private ProgressBar firstBar;
	private ProgressBar secondBar;

	private Button b;

	private int i = 0;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		firstBar = (ProgressBar) findViewById(R.id.firstBar);
		secondBar = (ProgressBar) findViewById(R.id.secondBar);
		b = (Button) findViewById(R.id.b);
		b.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				if (i == 0) {
					firstBar.setVisibility(ProgressBar.VISIBLE);
					secondBar.setVisibility(ProgressBar.VISIBLE);
				} else if (i < 100) {
					firstBar.setProgress(i);
					firstBar.setSecondaryProgress(i + 10);
				} else {
					firstBar.setVisibility(View.GONE);
					secondBar.setVisibility(View.GONE);
				}
				i += 10;
				System.out.println(i);
				// Toast.makeText(Activity08.this, i,
				// Toast.LENGTH_SHORT).show();
			}
		});
	}
}