新しいアクティビティの開始時にアプリケーションがクラッシュする（Accelerometerデータを使用）

Question

this（私のアクティビティはメインと呼ばれます）を私のアプリケーションのアクティビティとしてインプリメントしようとしましたが、MainPageのJavaクラスからボタンを押して起動できます私はそれがクラッシュする活動を開始するためにボタンを押すと、私はそれが加速度計データを使用するためのアクセス許可を要求することと関係があるかもしれないと思うが、私はわからない。任意のヘルプ

ため

おかげで、ここで私はとのトラブルを抱えている活動がから起動されるメインページです：

package shake.shake; 

import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageButton; 

public class MainPage extends AppCompatActivity { 
    private static Button ShakeButton1; 
    private static ImageButton SettingsButton1; 
    private static ImageButton HistoryButton1; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main_page); 
     OnClickButtonListener(); 
    } 
    public void OnClickButtonListener() 
    { 
     ShakeButton1 = (Button)findViewById(R.id.ShakeButton); 
     ShakeButton1.setOnClickListener(
       new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent intentSecondActivity = new Intent(MainPage.this, main.class); 
         startActivity(intentSecondActivity); 
          } 
       }); 
     SettingsButton1 = (ImageButton)findViewById(R.id.SettingsButton); 
     SettingsButton1.setOnClickListener(
       new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent intentSecondActivity = new Intent(MainPage.this, Settingspage.class); 
         startActivity(intentSecondActivity); 
        } 
       }); 
     HistoryButton1 = (ImageButton)findViewById(R.id.HistoryButton); 
     HistoryButton1.setOnClickListener(
       new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent intentSecondActivity = new Intent(MainPage.this, Historypage.class); 
         startActivity(intentSecondActivity); 
        } 
       }); 
}} 

は、ここでアプリがクラッシュする活動です：

package shake.shake; 

/** 
* Created by ink on 3/24/16. 
*/ 
import android.app.Activity; 
import android.content.Context; 
import android.hardware.Sensor; 
import android.hardware.SensorEvent; 
import android.hardware.SensorEventListener; 
import android.hardware.SensorManager; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.ImageView; 
import android.widget.TextView; 

public class main extends Activity implements SensorEventListener { 
    private float mLastX, mLastY, mLastZ; 
    private boolean mInitialized; 
    private SensorManager mSensorManager; 
    private Sensor mAccelerometer; 
    private final float NOISE = (float) 2.0; 
    /** Called when the activity is first created. */ 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     mInitialized = false; 
     mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); 
     mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); 
     mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL); 
    } 
    protected void onResume() { 
     super.onResume(); 
     mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL); 
    } 
    protected void onPause() { 
     super.onPause(); 
     mSensorManager.unregisterListener(this); 
    } 

    @Override 
    public void onAccuracyChanged(Sensor sensor, int accuracy) { 
// can be safely ignored for this demo 
    } 

    @Override 
    public void onSensorChanged(SensorEvent event) { 
     TextView tvX= (TextView)findViewById(R.id.x_axis); 
     TextView tvY= (TextView)findViewById(R.id.y_axis); 
     TextView tvZ= (TextView)findViewById(R.id.z_axis); 
     ImageView iv = (ImageView)findViewById(R.id.image); 
     float x = event.values[0]; 
     float y = event.values[1]; 
     float z = event.values[2]; 
     if (!mInitialized) { 
      mLastX = x; 
      mLastY = y; 
      mLastZ = z; 
      tvX.setText("0.0"); 
      tvY.setText("0.0"); 
      tvZ.setText("0.0"); 
      mInitialized = true; 
     } 
     else { 
      float deltaX = Math.abs(mLastX - x); 
      float deltaY = Math.abs(mLastY - y); 
      float deltaZ = Math.abs(mLastZ - z); 
      if (deltaX < NOISE) deltaX = (float)0.0; 
      if (deltaY < NOISE) deltaY = (float)0.0; 
      if (deltaZ < NOISE) deltaZ = (float)0.0; 
      mLastX = x; 
      mLastY = y; 
      mLastZ = z; 
      tvX.setText(Float.toString(deltaX)); 
      tvY.setText(Float.toString(deltaY)); 
      tvZ.setText(Float.toString(deltaZ)); 
      iv.setVisibility(View.VISIBLE); 
      if (deltaX > deltaY) { 
       iv.setImageResource(R.drawable.horizontal); 
      } else if (deltaY > deltaX) { 
       iv.setImageResource(R.drawable.vertical); 
      } else { 
       iv.setVisibility(View.INVISIBLE); 
      } 
     } 
    } 
} 

マニフェストもここにあります：

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="shake.shake"> 
    <uses-feature android:name="android.hardware.sensor.accelerometer" android:required="true" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <activity android:name=".MainPage"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity 
      android:name=".Settingspage" 
      android:label="@string/title_activity_settingspage" /> 
     <activity 
      android:name=".Historypage" 
      android:label="@string/title_activity_historypage" 
      android:theme="@style/AppTheme.NoActionBar"></activity> 
    </application> 

</manifest> 

ここcrashlogです：

03-27 21:55:40.742 19759-19759/shake.shake E/AndroidRuntime: FATAL EXCEPTION: main 
 
                  Process: shake.shake, PID: 19759 
 
                  android.content.ActivityNotFoundException: Unable to find explicit activity class {shake.shake/shake.shake.main}; have you declared this activity in your AndroidManifest.xml? 
 
                   at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1794) 
 
                   at android.app.Instrumentation.execStartActivity(Instrumentation.java:1512) 
 
                   at android.app.Activity.startActivityForResult(Activity.java:3930) 
 
                   at android.app.Activity.startActivityForResult(Activity.java:3890) 
 
                   at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:843) 
 
                   at android.app.Activity.startActivity(Activity.java:4213) 
 
                   at android.app.Activity.startActivity(Activity.java:4181) 
 
                   at shake.shake.MainPage$1.onClick(MainPage.java:29) 
 
                   at android.view.View.performClick(View.java:5204) 
 
                   at android.view.View$PerformClick.run(View.java:21155) 
 
                   at android.os.Handler.handleCallback(Handler.java:739) 
 
                   at android.os.Handler.dispatchMessage(Handler.java:95) 
 
                   at android.os.Looper.loop(Looper.java:148) 
 
                   at android.app.ActivityThread.main(ActivityThread.java:5422) 
 
                   at java.lang.reflect.Method.invoke(Native Method) 
 
                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
 
                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Answer 1

は、あなたの "メイン" クラス

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="shake.shake"> 
    <uses-feature android:name="android.hardware.sensor.accelerometer" android:required="true" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <activity android:name=".MainPage"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity 
      android:name=".main" /> 
     <activity 
      android:name=".Settingspage" 
      android:label="@string/title_activity_settingspage" /> 
     <activity 
      android:name=".Historypage" 
      android:label="@string/title_activity_historypage" 
      android:theme="@style/AppTheme.NoActionBar"></activity> 
    </application> 

</manifest>