عند استخدام تعطل تطبيق التسارع
https://stackoverflow.com//questions/23032751
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لا أستطيع أن أجد أين المشكلة.عندما هزت الهاتف ما ينبغي أن يفعله هو تغيير نص TextView ، ولكن بدلاً من ذلك عندما أزعجه.ما هي المشكلة في الكود الخاص بي؟أحاول أن أنظر إلى logcat ولكني لست ماهرًا بعد أن فهمت شيئًا منه (خاصةً لأن لغتي الأم ليست الإنجليزية).شكرًا!النشاط الرئيسي
package nir.rauch.accelrate;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.Vibrator;
import android.widget.TextView;
public class MainActivity extends Activity
{
private ShakeListener mShaker;
public TextView text;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView text =(TextView)findViewById(R.id.textView1);
final Vibrator vibe = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
mShaker = new ShakeListener(this);
mShaker.setOnShakeListener(new ShakeListener.OnShakeListener () {
public void onShake()
{
vibe.vibrate(100);
text.setText("" + "what a suprise! after the shaking The text has been changed and it also "
+ "Vibrates , so AMAZING!");
}
});
}
@Override
public void onResume()
{
mShaker.resume();
super.onResume();
}
@Override
public void onPause()
{
mShaker.pause();
super.onPause();
}
}
نشاط شاكر
package nir.rauch.accelrate;
import android.hardware.SensorListener;
import android.hardware.SensorManager;
import android.content.Context;
import java.lang.UnsupportedOperationException;
public class ShakeListener implements SensorListener
{
private static final int FORCE_THRESHOLD = 350;
private static final int TIME_THRESHOLD = 100;
private static final int SHAKE_TIMEOUT = 500;
private static final int SHAKE_DURATION = 1000;
private static final int SHAKE_COUNT = 3;
private SensorManager mSensorMgr;
private float mLastX=-1.0f, mLastY=-1.0f, mLastZ=-1.0f;
private long mLastTime;
private OnShakeListener mShakeListener;
private Context mContext;
private int mShakeCount = 0;
private long mLastShake;
private long mLastForce;
public interface OnShakeListener
{
public void onShake();
}
public ShakeListener(Context context)
{
mContext = context;
resume();
}
public void setOnShakeListener(OnShakeListener listener)
{
mShakeListener = listener;
}
public void resume() {
mSensorMgr = (SensorManager)mContext.getSystemService(Context.SENSOR_SERVICE);
if (mSensorMgr == null) {
throw new UnsupportedOperationException("Sensors not supported");
}
boolean supported = mSensorMgr.registerListener(this, SensorManager.SENSOR_ACCELEROMETER, SensorManager.SENSOR_DELAY_GAME);
if (!supported) {
mSensorMgr.unregisterListener(this, SensorManager.SENSOR_ACCELEROMETER);
throw new UnsupportedOperationException("Accelerometer not supported");
}
}
public void pause() {
if (mSensorMgr != null) {
mSensorMgr.unregisterListener(this, SensorManager.SENSOR_ACCELEROMETER);
mSensorMgr = null;
}
}
public void onAccuracyChanged(int sensor, int accuracy) { }
public void onSensorChanged(int sensor, float[] values)
{
if (sensor != SensorManager.SENSOR_ACCELEROMETER) return;
long now = System.currentTimeMillis();
if ((now - mLastForce) > SHAKE_TIMEOUT) {
mShakeCount = 0;
}
if ((now - mLastTime) > TIME_THRESHOLD) {
long diff = now - mLastTime;
float speed = Math.abs(values[SensorManager.DATA_X] + values[SensorManager.DATA_Y] + values[SensorManager.DATA_Z] - mLastX - mLastY - mLastZ) / diff * 10000;
if (speed > FORCE_THRESHOLD) {
if ((++mShakeCount >= SHAKE_COUNT) && (now - mLastShake > SHAKE_DURATION)) {
mLastShake = now;
mShakeCount = 0;
if (mShakeListener != null) {
mShakeListener.onShake();
}
}
mLastForce = now;
}
mLastTime = now;
mLastX = values[SensorManager.DATA_X];
mLastY = values[SensorManager.DATA_Y];
mLastZ = values[SensorManager.DATA_Z];
}
}
}
ملف XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="40sp"
android:text="Does the Accelorometer works? Shake it and found out!" />
</RelativeLayout>
السجل الخاص بي:
04-12 18:49:15.831: E/SensorManager(5343): Exception dispatching input event.
04-12 18:49:15.831: E/AndroidRuntime(5343): FATAL EXCEPTION: main
04-12 18:49:15.831: E/AndroidRuntime(5343): java.lang.SecurityException: Requires VIBRATE permission
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.os.Parcel.readException(Parcel.java:1431)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.os.Parcel.readException(Parcel.java:1385)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.os.IVibratorService$Stub$Proxy.vibrateMagnitude(IVibratorService.java:342)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.os.SystemVibrator.vibrate(SystemVibrator.java:115)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.os.SystemVibrator.vibrate(SystemVibrator.java:83)
04-12 18:49:15.831: E/AndroidRuntime(5343): at nir.rauch.accelrate.MainActivity$1.onShake(MainActivity.java:25)
04-12 18:49:15.831: E/AndroidRuntime(5343): at nir.rauch.accelrate.ShakeListener.onSensorChanged(ShakeListener.java:79)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.hardware.LegacySensorManager$LegacyListener.onSensorChanged(LegacySensorManager.java:274)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.hardware.SystemSensorManager$SensorEventQueue.dispatchSensorEvent(SystemSensorManager.java:467)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.os.MessageQueue.nativePollOnce(Native Method)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.os.MessageQueue.next(MessageQueue.java:132)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.os.Looper.loop(Looper.java:124)
04-12 18:49:15.831: E/AndroidRuntime(5343): at android.app.ActivityThread.main(ActivityThread.java:5419)
04-12 18:49:15.831: E/AndroidRuntime(5343): at java.lang.reflect.Method.invokeNative(Native Method)
04-12 18:49:15.831: E/AndroidRuntime(5343): at java.lang.reflect.Method.invoke(Method.java:525)
04-12 18:49:15.831: E/AndroidRuntime(5343): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
04-12 18:49:15.831: E/AndroidRuntime(5343): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
04-12 18:49:15.831: E/AndroidRuntime(5343): at dalvik.system.NativeStart.main(Native Method)
04-12 18:55:45.396: E/SensorManager(6408): Exception dispatching input event.
04-12 18:55:45.401: E/AndroidRuntime(6408): FATAL EXCEPTION: main
04-12 18:55:45.401: E/AndroidRuntime(6408): java.lang.SecurityException: Requires VIBRATE permission
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.os.Parcel.readException(Parcel.java:1431)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.os.Parcel.readException(Parcel.java:1385)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.os.IVibratorService$Stub$Proxy.vibrateMagnitude(IVibratorService.java:342)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.os.SystemVibrator.vibrate(SystemVibrator.java:115)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.os.SystemVibrator.vibrate(SystemVibrator.java:83)
04-12 18:55:45.401: E/AndroidRuntime(6408): at nir.rauch.accelrate.MainActivity$1.onShake(MainActivity.java:25)
04-12 18:55:45.401: E/AndroidRuntime(6408): at nir.rauch.accelrate.ShakeListener.onSensorChanged(ShakeListener.java:79)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.hardware.LegacySensorManager$LegacyListener.onSensorChanged(LegacySensorManager.java:274)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.hardware.SystemSensorManager$SensorEventQueue.dispatchSensorEvent(SystemSensorManager.java:467)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.os.MessageQueue.nativePollOnce(Native Method)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.os.MessageQueue.next(MessageQueue.java:132)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.os.Looper.loop(Looper.java:124)
04-12 18:55:45.401: E/AndroidRuntime(6408): at android.app.ActivityThread.main(ActivityThread.java:5419)
04-12 18:55:45.401: E/AndroidRuntime(6408): at java.lang.reflect.Method.invokeNative(Native Method)
04-12 18:55:45.401: E/AndroidRuntime(6408): at java.lang.reflect.Method.invoke(Method.java:525)
04-12 18:55:45.401: E/AndroidRuntime(6408): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
04-12 18:55:45.401: E/AndroidRuntime(6408): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
04-12 18:55:45.401: E/AndroidRuntime(6408): at dalvik.system.NativeStart.main(Native Method)
المحلول
مثلك logcat قال،
java.lang.SecurityException:يتطلب إذن الاهتزاز
تحتاج إلى إذن الاهتزاز.لذلك تحتاج إلى إضافة السطر التالي إلى ملف البيان:
<uses-permission android:name="android.permission.VIBRATE"/>
لا تنتمي إلى StackOverflow
