Android学习笔记之使用意图打开内置应用程序组件

（1）布局文件如下：

<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=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:onClick="IntentTest"
        android:text="从Google搜索内容" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/button1"
        android:onClick="IntentTest"
        android:text="游览网页" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button2"
        android:layout_below="@+id/button2"
        android:onClick="IntentTest"
        android:text="显示地图" />

    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button3"
        android:layout_below="@+id/button3"
        android:onClick="IntentTest"
        android:text="拨打电话" />

    <Button
        android:id="@+id/button5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button4"
        android:layout_centerVertical="true"
        android:onClick="IntentTest"
        android:text="发短信" />

    <Button
        android:id="@+id/button6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button5"
        android:layout_below="@+id/button5"
        android:onClick="IntentTest"
        android:text="播放多媒体" />

    <Button
        android:id="@+id/button7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/button4"
        android:layout_below="@+id/button6"
        android:onClick="IntentTest"
        android:text="安装APK" />

    <Button
        android:id="@+id/button8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button7"
        android:layout_below="@+id/button7"
        android:onClick="IntentTest"
        android:text="卸载APK" />

</RelativeLayout>

（2）MainActivity.java

package com.example.intent_openinterapplicationapi;

import android.app.Activity;
import android.app.SearchManager;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {

	private Button button1;
	private Button button2;
	private Button button3;
	private Button button4;
	private Button button5;
	private Button button6;
	private Button button7;
	private Button button8;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button1 = (Button) this.findViewById(R.id.button1);
		button2 = (Button) this.findViewById(R.id.button2);
		button3 = (Button) this.findViewById(R.id.button3);
		button4 = (Button) this.findViewById(R.id.button4);
		button5 = (Button) this.findViewById(R.id.button5);
		button6 = (Button) this.findViewById(R.id.button6);
		button7 = (Button) this.findViewById(R.id.button7);
		button8 = (Button) this.findViewById(R.id.button8);

	}

	public void IntentTest(View v) {
		switch (v.getId()) {
		case R.id.button1:
			Intent intent = new Intent();
			intent.setAction(Intent.ACTION_WEB_SEARCH);
			intent.putExtra(SearchManager.QUERY, "searchString");
			startActivity(intent);
			break;
		case R.id.button2:
			Uri uri = Uri.parse("http://www.baidu.com");
			Intent intent2 = new Intent(Intent.ACTION_VIEW, uri);
			startActivity(intent2);
			break;
		case R.id.button3:
			Uri uri1 = Uri.parse("geo:38.899533,77.036476");
			Intent intent3 = new Intent(Intent.ACTION_VIEW, uri1);
			startActivity(intent3);
			break;
		case R.id.button4:
			Uri uri2 = Uri.parse("tel:18080808080");
			Intent intent4 = new Intent(Intent.ACTION_DIAL, uri2);
			startActivity(intent4);
			break;
		case R.id.button5:
			Intent intent5 = new Intent(Intent.ACTION_VIEW);
			intent5.putExtra("sms_body", "The SMS TEXT!");
			intent5.setType("vnd.android-dir/mms-sms");
			startActivity(intent5);
			break;
		case R.id.button6:
			Intent intent6 = new Intent(Intent.ACTION_VIEW);
			Uri uri3 = Uri.parse("file:///sdcard/song.mp3");
			intent6.setDataAndType(uri3, "audio/mp3");
			startActivity(intent6);
			break;
		case R.id.button7:
			Uri installUri = Uri.fromParts("package", "xxx", null);
			Intent intent7 = new Intent(Intent.ACTION_PACKAGE_ADDED);
			startActivity(intent7);
			break;
		case R.id.button8:
			Uri deletellUri = Uri.fromParts("package", "strPackageName", null);
			Intent intent8 = new Intent(Intent.ACTION_DELETE, deletellUri);
			startActivity(intent8);
			break;

		default:
			break;
		}
	}

	@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;
	}

}