android组件通讯 Intent-Action属性

Action属性应用实例

1、自定义Action属性

程序文件

/Chapter06_Intent_TestAction/src/com/amaker/ch06/app/MainActivity.java

package com.amaker.ch06.app;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
/**
 * 
 * 测试Intent Action 属性
 */
public class MainActivity extends Activity {
    // 定义Action 属性常量
    public static final String MY_ACTION="com.amaker.ch07.app.MY_ACTION";
    // 声明Button
    private Button btn;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 设置布局视图
        setContentView(R.layout.main);
        // 实例化Button
        btn = (Button)findViewById(R.id.Button01);
        btn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                 // 实例化Intent
                Intent intent = new Intent();
                // 为Intent设置Action属性
                intent.setAction(MY_ACTION);
                // 启动Activity
                startActivity(intent);
            }
        });
    }
}

/Chapter06_Intent_TestAction/src/com/amaker/ch06/app/MyActivity.java

package com.amaker.ch06.app;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
/**
 * 测试Intent Action 属性
 */
public class MyActivity extends Activity {
    // 声明TextView
    private TextView tv;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 设置视图布局
        setContentView(R.layout.my_layout);
        // 获得Intent对象
        Intent intent = getIntent();
        // 获得Action
        String action = intent.getAction();
        // 获得TextView
        tv = (TextView)findViewById(R.id.TextView01);
        // 设置内容
        tv.setText(action);
    }
}

 

布局文件

/Chapter06_Intent_TestAction/res/layout/main.xml

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

    <Button 
        android:text="测试Intent的Action属性" 
        android:id="@+id/Button01" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"></Button>

</LinearLayout>

/Chapter06_Intent_TestAction/res/layout/my_layout.xml

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

    <TextView 
        android:text="@+id/TextView01" 
        android:id="@+id/TextView01" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"></TextView>
    
</LinearLayout>

 

清单文件

/Chapter06_Intent_TestAction/AndroidManifest.xml

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.amaker.ch06.app"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
    
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <activity android:name="MyActivity">
            <intent-filter>
                <action android:name="com.amaker.ch06.app.MY_ACTION" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

    </application>
    <uses-sdk android:minSdkVersion="3" />

</manifest> 

 

 

 

2、访问系统的Action属性

程序文件

/Chapter06_Intent_TestAction2/src/com/amaker/ch06/app/MainActivity.java

package com.amaker.ch06.app;

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

/**
 * 
 * 测试Intent Action 属性
 */
public class MainActivity extends Activity {
    // 声明Button
    private Button btn;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 设置当前布局视图
        setContentView(R.layout.main);
        // 实例化Button
        btn = (Button)findViewById(R.id.Button01);
        btn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // 创建Intent
                Intent intent = new Intent();
                // 设置Intent Action属性
                intent.setAction(Intent.ACTION_GET_CONTENT);
                // 设置Intent Type 属性
                intent.setType("vnd.android.cursor.item/phone");
                // 启动Activity
                startActivity(intent);
            }
        });
    }
}

 

布局文件

/Chapter06_Intent_TestAction2/res/layout/main.xml

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

    <Button 
        android:text="测试Intent的 Action属性" 
        android:id="@+id/Button01" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"></Button>

</LinearLayout>

 

清单文件

/Chapter06_Intent_TestAction2/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.amaker.ch06.app"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-sdk android:minSdkVersion="3" />

</manifest>