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首先我们示例工程一览表如下：
1.首先我们还是买一个收音机，定义一个OutCallReceiver继承自BroadcastReceiver，onReceive（）方法中定义了监听到广播，要执行的操作：
public class OutCallReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
SharedPreferences sp = context.getSharedPreferences("config", 0);
// 修改用户拨打的电话号码， 在号码前面加上17951
String number = getResultData();
System.out.println("------有外拨电话出去了。" + number);
if (number.startsWith("0")) {
setResultData(sp.getString("ipnumber", "")+ number);
}
setResultData(null);
}
}
2.装电池 和 调频道，在AndroidManifest.xml文件中配置：
<receiver android:name="com.itheima.ipdailer.OutCallReceiver">
<intent-filter >
<action android:name="android.intent.action.NEW_OUTGOING_CALL"/>
</intent-filter>
</receiver>
这里注意添加一个外接电话拨入权限：
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>
3.工程代码总览图：
（1）activity_main.xml:
<LinearLayout 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:orientation="vertical" tools:context=".MainActivity" > <EditText android:id="@+id/et_ipnumber" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="请输入要设置的ip号码前缀" /> <Button android:onClick="save" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="保存" /> </LinearLayout>
（2）MainActivity.java:
package com.itheima.ipdailer; import android.app.Activity; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.os.Bundle; import android.view.View; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { private EditText et_ipnumber; private SharedPreferences sp; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_ipnumber = (EditText) findViewById(R.id.et_ipnumber); sp = this.getSharedPreferences("config", 0); et_ipnumber.setText(sp.getString("ipnumber", "")); } public void save(View view){ String ipnumber = et_ipnumber.getText().toString().trim(); Editor editor = sp.edit(); editor.putString("ipnumber", ipnumber); editor.commit(); Toast.makeText(this, "设置成功", 0).show(); } }
（3）OutCallReceiver.java:
package com.itheima.ipdailer; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; //买一个收音机 public class OutCallReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { SharedPreferences sp = context.getSharedPreferences("config", 0); // 修改用户拨打的电话号码， 在号码前面加上17951 String number = getResultData(); System.out.println("------有外拨电话出去了。" + number); if (number.startsWith("0")) { setResultData(sp.getString("ipnumber", "")+ number); } setResultData(null); } }
（4）AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.itheima.ipdailer" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" />
//添加一个外接电话拨入的权限 <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.itheima.ipdailer.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>
//装电池，调频道 <receiver android:name="com.itheima.ipdailer.OutCallReceiver"> <intent-filter > <action android:name="android.intent.action.NEW_OUTGOING_CALL"/> </intent-filter> </receiver>
</application>
</manifest>
Android（java）学习笔记175：外拨电话的广播接收者
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原文地址：http://www.cnblogs.com/hebao0514/p/4741598.html
