Android拨打接听电话自动免提

权限：

  <uses-permission android:name="android.permission.READ_PHONE_STATE"/>  
    <uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />  
    <uses-permission android:name="android.permission.CALL_PHONE" />  
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />  

public class MainActivity extends AppCompatActivity {

    AudioManager audioManager;
    int currVolume;//当前音量

    @Override
    protected void onCreateBundle savedInstanceState) {
        super.onCreatesavedInstanceState);
        setContentViewR.layout.activity_main);
        TelephonyManager telManager = TelephonyManager) getSystemServiceContext.TELEPHONY_SERVICE);
        TelListner listener = new TelListner);
        telManager.listenlistener, PhoneStateListener.LISTEN_CALL_STATE);
        audioManager = AudioManager) getSystemServiceContext.AUDIO_SERVICE);
    }

    public void clickView v) {
        if Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if MainActivity.this.checkSelfPermissionManifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
                callPhone);
            } else {
                //
                Toast.makeTextthis, "没有权限", Toast.LENGTH_LONG).show);
            }
        } else {
            callPhone);
        }
    }

    void callPhone) {
        Intent callIntent = new IntentIntent.ACTION_CALL);
        callIntent.setDataUri.parse"tel:10086"));
        callIntent.setFlagsIntent.FLAG_ACTIVITY_NEW_TASK);
        startActivitycallIntent);
    }

    private class TelListner extends PhoneStateListener {
        boolean comingPhone = false;//标识

        @Override
        public void onCallStateChangedint state, String incomingNumber) {
            switch state) {
                case TelephonyManager.CALL_STATE_IDLE:/* 无任何状态 */
                    if this.comingPhone) {
                        this.comingPhone = false;
                        setSpeekModlefalse);
                    }
                    break;
                case TelephonyManager.CALL_STATE_OFFHOOK:/* 接起电话 */
                    this.comingPhone = true;
                    setSpeekModletrue);
                    break;
                case TelephonyManager.CALL_STATE_RINGING:/* 电话进来 */
                    this.comingPhone = true;
                    setSpeekModletrue);
                    break;
            }
        }
    }

    void setSpeekModleboolean open) {
        audioManager.setModeAudioManager.ROUTE_SPEAKER);
        currVolume = audioManager.getStreamVolumeAudioManager.STREAM_VOICE_CALL);
        //5.0以上
        if Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            audioManager.setModeAudioManager.MODE_IN_COMMUNICATION);

        } else {
            audioManager.setModeAudioManager.MODE_IN_CALL);
        }

        if !audioManager.isSpeakerphoneOn) && open) {
            Toast.makeTextMainActivity.this, "免提模式", Toast.LENGTH_LONG).show);
            audioManager.setSpeakerphoneOntrue);//开启免提
            audioManager.setStreamVolumeAudioManager.STREAM_VOICE_CALL,
                    audioManager.getStreamMaxVolumeAudioManager.STREAM_VOICE_CALL),
                    AudioManager.STREAM_VOICE_CALL);
        } else if audioManager.isSpeakerphoneOn) && open) {
            audioManager.setSpeakerphoneOnfalse);
            audioManager.setStreamVolumeAudioManager.STREAM_VOICE_CALL, currVolume,
                    AudioManager.STREAM_VOICE_CALL);
        }
    }
}

ps：此方式在华为手机上不兼容