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
代码
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
代码
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
代码
<?
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
代码
<?
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
代码
<?
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
代码
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
代码
<?
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
代码
<?
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
>