android 去电监听录音（通过广播和服务）

2019-04-13 14:04发布

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通过广播，实现去电监听，通过服务实现录音。 开发工具：Android Studio 3.0.1 看代码：     broadcastReceiver.java   package com.example.test_6application; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.widget.Toast; public class broadcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { // TODO: This method is called when the BroadcastReceiver is receiving // an Intent broadcast. //throw new UnsupportedOperationException("Not yet implemented"); if (intent.getAction().equals("android.intent.action.NEW_OUTGOING_CALL")) { String phoneNum = intent.getStringExtra( Intent.EXTRA_PHONE_NUMBER ); Toast.makeText( context, "监听到拨打电话:" +phoneNum , Toast.LENGTH_SHORT ).show(); //其他操作，如启动另一个Activiy： //Intent it = new Intent( context, ***Activity.class ); //context.startActivity(it); Intent it = new Intent( context,recordService.class ); context.startService(it); //启动录音服务 } } }           //先创建一个广播   再创建一个服务(recordService.java) //使用MediaRecorder类实现录音 源码：   package com.example.test_6application; import android.app.Service; import android.content.Intent; import android.media.MediaRecorder; import android.os.IBinder; import java.io.File; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; public class recordService extends Service { private File recordFile; // 录音类 private MediaRecorder mediaRecorder; public recordService() { } @Override public IBinder onBind(Intent intent) { // TODO: Return the communication channel to the service. throw new UnsupportedOperationException("Not yet implemented"); } @Override public void onCreate() { super.onCreate(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { SimpleDateFormat formatter = new SimpleDateFormat ("yyyy年MM月dd日 HH:mm:ss "); Date curDate = new Date(System.currentTimeMillis());//获取当前时间 String str = formatter.format(curDate); // recordFile = new File("/sdcard", "kk.amr"); recordFile = new File("/sdcard/"+"_"+str+".3gp"); mediaRecorder = new MediaRecorder(); // 判断，若当前文件已存在，则删除 if (recordFile.exists()) { recordFile.delete(); } mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//设置音频输入源 ,麦克风 mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); //设置音频输出格式 three_gpp mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);//设置音频编码方式 amr_nb mediaRecorder.setOutputFile(recordFile.getAbsolutePath()); try { // 准备好开始录音 mediaRecorder.prepare(); mediaRecorder.start(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return super.onStartCommand(intent, flags, startId); } @Override public void onDestroy() { if (recordFile != null) { mediaRecorder.stop(); mediaRecorder.release(); } super.onDestroy(); } }   创建方法：     MainActivity.java android 6.0以上要获取手机打电话、录音、存储权限，及以下代码的3个 if 条件语句 注意要引入 v4-27.1.1 包     package com.example.test_6application; import android.Manifest; import android.app.Activity; import android.content.Intent; import android.content.pm.PackageManager; import android.os.Bundle; import android.support.v4.app.ActivityCompat; import android.view.View; import android.widget.Button; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.PROCESS_OUTGOING_CALLS) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.PROCESS_OUTGOING_CALLS}, 123); return; } if (ActivityCompat.checkSelfPermission( MainActivity.this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED ) { ActivityCompat.requestPermissions( MainActivity.this, new String[] { Manifest.permission.RECORD_AUDIO }, 12345); return; } if (ActivityCompat.checkSelfPermission( MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED ) { ActivityCompat.requestPermissions( MainActivity.this, new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE }, 123456); return; } Button bt2=(Button) findViewById(R.id.button2); bt2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent it = new Intent( MainActivity.this,recordService.class ); stopService(it); } }); } }   activitymain.xml    

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