Android自定义action与permission!!!

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大家好，今天给大家简单分享一下Android中自定义action与permission. 我们在实际开发中,经常会用到系统的功能，比如打电话功能只要如以下简单代码:

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Uri uri = Uri.parse("tel.xxxxxx");
Intent it =new Intent(Intent.ACTION_CALL,uri);
startActivity(it);
Uri uri = Uri.parse("tel.xxxxxx");
Intent it =new Intent(Intent.ACTION_CALL,uri);
startActivity(it);

并且在AndroidManifest.xml文件中添加如下权限:

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<uses-permission id="android .permission.CALL_PHONE" />
<uses-permission id="android .permission.CALL_PHONE" />

下面我将实例给大家分享一下自定义action与permission.实例有两个Android工程Demo,与Demo2. Demo工程有两个Activity一个是主Activity,另一个是ViewActivity,这个Activity我们给自定义了android.tutor.action.VIEW的action以及com.tutor.permission.VIEW的permission。

另一个Demo2的主Activity去调用Demo里的ViewActivity,代码如下:

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Intent mIntent = new Intent();
mIntent.setAction("android.tutor.action.VIEW");
startActivity(mIntent);
Intent mIntent = new Intent();
mIntent.setAction("android.tutor.action.VIEW");
startActivity(mIntent);

并且要在AndroidMainfest.xml添加以下权限:

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<uses-permission android:name="com.tutor.permission.VIEW"></uses-permission>
<uses-permission android:name="com.tutor.permission.VIEW"></uses-permission>

下面是具体步骤如下:

第一步:新建第一个Android工程Demo.目录结构如下:

第二步:新建名为ViewActivity的Activity，代码如下:

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package com.tutor.demo;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class ViewActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

TextView mTextView = new TextView(this);
mTextView.setText("我是自定义action并且加了权限的Activity.");
setContentView(mTextView);
}
}
package com.tutor.demo;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class ViewActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

TextView mTextView = new TextView(this);
mTextView.setText("我是自定义action并且加了权限的Activity.");
setContentView(mTextView);
}
}

第三步:在AndroidMainfest.xml中定义action与permission,代码如下:

第6,7,20行代码定义了permission,第18-21行定义了action.第28行是同一个android工程访问ViewActivity也要申请权限.

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.tutor.demo"
android:versionCode="1"
android:versionName="1.0">
<permission android:protectionLevel="normal" android:name="com.tutor.permission.VIEW">
　　 </permission>

<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".Demo"
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=".ViewActivity"
android:label="自定义action与permission"
android:permission="com.tutor.permission.VIEW"
>
<intent-filter>
<action android:name="android.tutor.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="com.tutor.permission.VIEW"></uses-permission>
</manifest>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.tutor.demo"
android:versionCode="1"
android:versionName="1.0">
<permission android:protectionLevel="normal" android:name="com.tutor.permission.VIEW">
　　 </permission>

<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".Demo"
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=".ViewActivity"
android:label="自定义action与permission"
android:permission="com.tutor.permission.VIEW"
>
<intent-filter>
<action android:name="android.tutor.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="com.tutor.permission.VIEW"></uses-permission>
</manifest>

第四步:修改主Activity,Demo.java代码如下(在onCreate()里去跳转到ViewActivity,也需要申请权限的如上面的第28行代码):

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package com.tutor.demo;
import com.tutor.demo.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class Demo extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//跳转ViewActivity
Intent mIntent = new Intent();
mIntent.setAction("android.tutor.action.VIEW");
startActivity(mIntent);
}
}
package com.tutor.demo;
import com.tutor.demo.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class Demo extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//跳转ViewActivity
Intent mIntent = new Intent();
mIntent.setAction("android.tutor.action.VIEW");
startActivity(mIntent);
}
}

第五步:运行Demo工程，效果如下图:

上面是同一个Android工程里访问ViewActivity的情形，下面我们新建一个Demo2的android工程，去调用ViewActivity.

Demo2.java代码如下:

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package com.tutor.demo2;
import com.tutor.demo2.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class Demo2 extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//访问应用demo里的ViewActivity
Intent mIntent = new Intent();
mIntent.setAction("android.tutor.action.VIEW");
startActivity(mIntent);
}
}
package com.tutor.demo2;
import com.tutor.demo2.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class Demo2 extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//访问应用demo里的ViewActivity
Intent mIntent = new Intent();
mIntent.setAction("android.tutor.action.VIEW");
startActivity(mIntent);
}
}