VibrationEffectがClassNotFoundException

Caused by: java.lang.ClassNotFoundException: Didn't find class "android.os.VibrationEffect" on path: DexPathList[[zip file "/data/app/com.dontinstall.nevertouchme-2/base.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_dependencies_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_0_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_1_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_2_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_3_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_4_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_5_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_6_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_7_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_8_apk.apk", zip file "/data/app/com.dontinstall.nevertouchme-2/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.dontinstall.nevertouchme-2/lib/arm, /system/lib, /vendor/lib]]

Java
1public class MainActivity extends AppCompatActivity implements SensorEventListener {
2
3    private ScrollView scView;
4    private TextView txtView;
5    private SensorManager mSensorManager;
6    private Sensor mProximity;
7
8    private float mPreValue = 1;
9    private Vibrator vibrator;
10
11    @Override
12    protected void onCreate(Bundle savedInstanceState) {
13        super.onCreate(savedInstanceState);
14        setContentView(R.layout.activity_main);
15
16
17        LinearLayout layout = new LinearLayout(this);
18
19        layout.setOrientation(LinearLayout.VERTICAL);
20
21        setContentView(layout);
22
23        scView = new ScrollView(this);
24
25        scView.setLayoutParams(new LinearLayout.LayoutParams(
26                LinearLayout.LayoutParams.MATCH_PARENT,
27                LinearLayout.LayoutParams.WRAP_CONTENT
28        ));
29
30        layout.addView(scView);
31
32        txtView = new TextView(this);
33
34        txtView.setText("");
35
36        txtView.setLayoutParams(new LinearLayout.LayoutParams(
37                LinearLayout.LayoutParams.MATCH_PARENT,
38                LinearLayout.LayoutParams.WRAP_CONTENT
39        ));
40
41        scView.addView(txtView);
42
43
44        mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
45        List<Sensor> list = mSensorManager.getSensorList(Sensor.TYPE_PROXIMITY);
46
47        if(list.size() > 0) {
48            mProximity = list.get(0);
49        }
50    }
51
52    @Override
53    public void onResume() {
54        super.onResume();
55        if(mProximity != null) {
56            mSensorManager.registerListener(
57                    this,mProximity, SensorManager.SENSOR_DELAY_UI);
58
59
60        }
61    }
62
63    public void onStop() {
64        super.onStop();
65        mSensorManager.unregisterListener(this);
66    }
67
68    @TargetApi(Build.VERSION_CODES.O)
69    @Override
70    public void onSensorChanged(SensorEvent sensorEvent) {
71        if(sensorEvent.sensor.getType() != Sensor.TYPE_PROXIMITY) {
72            return;
73
74
75        }
76        logValues(sensorEvent.values);
77
78        if(sensorEvent.values[0] < mPreValue) {
79            vibrate();
80            voice();
81        }
82
83        mPreValue = sensorEvent.values[0];
84
85    }
86
87    private void logValues(float[] values) {
88        txtView.append("Proximity value:" + values[0] + "\n");
89    }
90
91    @RequiresApi(api = Build.VERSION_CODES.O)
92    private void vibrate() {
93        Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
94
95            // 1000 : Vibrate for 1 sec
96            // VibrationEffect.DEFAULT_AMPLITUDE - would perform vibration at full strength
97            VibrationEffect effect = VibrationEffect.createOneShot(1000, VibrationEffect.DEFAULT_AMPLITUDE);
98            vibrator.vibrate(effect);
99
100//        long[] pattern = {25,25,25,25};
101//
102////        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
103//            vibrator.vibrate(VibrationEffect.createWaveform(pattern,VibrationEffect.DEFAULT_AMPLITUDE));
104
105//        vibrator.vibrate(pattern,-1);
106
107    }
108    private void voice() {
109        VoicePlayer vPlayer = new VoicePlayer();
110
111        vPlayer.play();
112    }
113
114
115
116    @Override
117    public void onAccuracyChanged(Sensor sensor, int i) {
118
119    }
120
121
122}
123

Buildに何か追加すれば動きなそうなのですが、検索しても同じ症例がなく・・・
どうしたらいいのでしょうか？
よろしくお願いします

行動規範の内容に同意します

回答1件

Android 8.0未満のエミュレーターまたは端末実機でアプリを動作させているからではないでしょうか

VoicePlayerが何なのかわからないので、そこはコメントアウトした上での検証ですが。VibrationEffectはAPI 26（Android 8.0）で追加された機能なので（私もよくは知らない）、API 26未満のAVDで動作させるとvibrateメソッドが走るタイミングでアプリが落ちますね。そのときのLogCatには、確かに質問のような内容が出力されます。API 26のAVDであれば正常に動作するようです。

そういう問題なのでは？

投稿2017/11/24 14:49

編集2017/11/24 17:00