目标:通过拨号盘,输入*#*#1024#*#*暗码启动某应用
步骤:
1.使用Android Studio创建一个project,MainActivity用来代表通过暗码打开的应用
package com.jni.demo;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
// Used to load the 'native-lib' library on application startup.
static {
System.loadLibrary("native-lib");
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Example of a call to a native method
TextView tv = findViewById(R.id.sample_text);
tv.setText(stringFromJNI());
}
/**
* A native method that is implemented by the 'native-lib' native library,
* which is packaged with this application.
*/
public native String stringFromJNI();
}
2.AndroidManifest.xml文件配置,注册一个receiver,添加Intent过滤条件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jni.demo">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
//receiver标签内容为新增部分
<receiver android:name="Me">
<intent-filter>
<action android:name="android.provider.Telephony.SECRET_CODE"/>
<!-- *#*#1024#*#* -->
<data android:scheme="android_secret_code" android:host="1024"/>
</intent-filter>
</receiver>
</application>
</manifest>
3.创建Me类接收广播,在收到Intent的action为“android.provider.Telephony.SECRET_CODE”时启动应用
package com.jni.demo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import static android.provider.Telephony.Sms.Intents.SECRET_CODE_ACTION;
public class Me extends BroadcastReceiver {
public static native int sub(int a, int b);
public void onReceive(Context context, Intent intent) {
if (intent != null && SECRET_CODE_ACTION.equals(intent.getAction())){
Intent i = new Intent(Intent.ACTION_MAIN);
i.setClass(context, MainActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
}
4.拨号盘输入*#*#1024#*#*即可启动应用,it's over!!!