在打出電話之前檢測SIM卡提供商蜂窩塔的強度

如何在打出電話之前獲得蜂窩塔的強度，如果沒有信號或沒有足夠的強度，它應該提示用戶輸入文字無信號。在打出電話之前檢測SIM卡提供商蜂窩塔的強度

2014-01-07 Amrit Pal Singh

看到這個signalStrength ..this應該做的伎倆

2014-01-07 09:12:28

喜，請使用如下代碼希望它會解決你的問題

HomeActivity .java 

// Android Packages 
import android.app.Activity; 
import android.os.Bundle; 
import android.os.Build; 
import android.os.AsyncTask; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.content.Context; 
import android.content.Intent; 
import android.widget.TextView; 
import android.widget.Button; 
import android.telephony.SignalStrength; 
import android.telephony.PhoneStateListener; 
import android.telephony.TelephonyManager; 
import android.telephony.CellLocation; 
import android.telephony.cdma.CdmaCellLocation; 
import android.telephony.gsm.GsmCellLocation; 
import android.widget.Toast; 
import android.util.Log; 

public final class HomeActivity extends Activity 
{ 
     public static final String TAG = HomeActivity.class.getSimpleName(); 

     public static final String EMAIL = "[email protected]"; 

     private CellLocation mCellLocation; 
     private SignalStrength mSignalStrength; 
     private boolean mDone = false; 
     private TextView mText = null; 
     private String mTextStr; 
     private Button mSubmit, mCancel; 
     private TelephonyManager mManager; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     mManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); 
      mText = (TextView) findViewById(R.id.text); 
      mSubmit = (Button) findViewById(R.id.submit); 
      mCancel = (Button) findViewById(R.id.cancel); 

      // Prevent button press. 
      mSubmit.setEnabled(false); 

      // Handle click events. 
      mSubmit.setOnClickListener(new OnClickListener() 
      { 
        @Override 
        public void onClick(View mView) 
        { 
          sendResults(); 
          finish(); 
        } 
      }); 
      mCancel.setOnClickListener(new OnClickListener() 
      { 
        @Override 
        public void onClick(View mView) 
        { 
          finish(); 
        } 
      }); 

      // Register the listener with the telephony manager 
      mManager.listen(mListener, PhoneStateListener.LISTEN_SIGNAL_STRENGTHS | 
        PhoneStateListener.LISTEN_CELL_LOCATION); 
    } 

    // Listener for signal strength. 
    final PhoneStateListener mListener = new PhoneStateListener() 
    { 
      @Override 
      public void onCellLocationChanged(CellLocation mLocation) 
      { 
        if (mDone) return; 

        Log.d(TAG, "Cell location obtained."); 

        mCellLocation = mLocation; 

        update(); 
      } 

      @Override 
      public void onSignalStrengthsChanged(SignalStrength sStrength) 
      { 
        if (mDone) return; 

        Log.d(TAG, "Signal strength obtained."); 

        mSignalStrength = sStrength; 

        update(); 
      } 
    }; 

    // AsyncTask to avoid an ANR. 
    private class ReflectionTask extends AsyncTask<Void, Void, Void> 
    { 
       protected Void doInBackground(Void... mVoid) 
       { 
         mTextStr = 
          ("DEVICE INFO\n\n" + "SDK: `" + Build.VERSION.SDK_INT + "`\nCODENAME: `" + 
          Build.VERSION.CODENAME + "`\nRELEASE: `" + Build.VERSION.RELEASE + 
          "`\nDevice: `" + Build.DEVICE + "`\nHARDWARE: `" + Build.HARDWARE + 
          "`\nMANUFACTURER: `" + Build.MANUFACTURER + "`\nMODEL: `" + Build.MODEL + 
          "`\nPRODUCT: `" + Build.PRODUCT + ((getRadio() == null) ? "" : ("`\nRADIO: `" + getRadio())) + 
          "`\nBRAND: `" + Build.BRAND + ((Build.VERSION.SDK_INT >= 8) ? ("`\nBOOTLOADER: `" + Build.BOOTLOADER) : "") + 
          "`\nBOARD: `" + Build.BOARD + "`\nID: `"+ Build.ID + "`\n\n" + 
          ReflectionUtils.dumpClass(SignalStrength.class, mSignalStrength) + "\n" + 
          ReflectionUtils.dumpClass(mCellLocation.getClass(), mCellLocation) + "\n" + getWimaxDump() + 
          ReflectionUtils.dumpClass(TelephonyManager.class, mManager) + 
          ReflectionUtils.dumpStaticFields(Context.class, getApplicationContext())); 

        return null; 
       } 

       protected void onProgressUpdate(Void... progress) 
       { 
         // Do nothing... 
       } 

       protected void onPostExecute(Void result) 
       { 
         complete(); 
       } 
     } 

    private final void complete() 
    { 
      mDone = true; 

      try 
      { 
        mText.setText(mTextStr); 

         // Stop listening. 
         mManager.listen(mListener, PhoneStateListener.LISTEN_NONE); 
         Toast.makeText(getApplicationContext(), R.string.done, Toast.LENGTH_SHORT).show(); 

         mSubmit.setEnabled(true); 
       } 
       catch (Exception e) 
       { 
         Log.e(TAG, "ERROR!!!", e); 
       } 
    } 

    private final void update() 
    { 
      if (mSignalStrength == null || mCellLocation == null) return; 

      final ReflectionTask mTask = new ReflectionTask(); 
      mTask.execute(); 
    } 

    /** 
    * @return The Radio of the {@link Build} if available. 
    */ 
    public static final String getRadio() 
    { 
      if (Build.VERSION.SDK_INT >= 8 && Build.VERSION.SDK_INT < 14) 
        return Build.RADIO; 
      else if (Build.VERSION.SDK_INT >= 14) 
        return Build.getRadioVersion(); 
      else 
        return null; 
    } 

    private static final String[] mServices = 
     { 
       "WiMax", "wimax", "wimax", "WIMAX", "WiMAX" 
     }; 

    /** 
    * @return A String containing a dump of any/ all WiMax 
    * classes/ services loaded via {@link Context}. 
    */ 
    public final String getWimaxDump() 
    { 
      String mStr = ""; 

      for (final String mService : mServices) 
      { 
        final Object mServiceObj = getApplicationContext() 
          .getSystemService(mService); 
        if (mServiceObj != null) 
        { 
          mStr += "getSystemService(" + mService + ")\n\n"; 
          mStr += ReflectionUtils.dumpClass(mServiceObj.getClass(), mServiceObj); 
         } 
      } 

      return mStr; 
    } 

    /** 
    * Start an {@link Intent} chooser for the user to submit the results. 
    */ 
    public final void sendResults() 
    { 
      final Intent mIntent = new Intent(Intent.ACTION_SEND); 
       mIntent.setType("plain/text"); 
       mIntent.putExtra(Intent.EXTRA_EMAIL, new String[] { EMAIL }); 
       mIntent.putExtra(Intent.EXTRA_SUBJECT, getString(R.string.results)); 
       mIntent.putExtra(Intent.EXTRA_TEXT, mTextStr); 
       HomeActivity.this.startActivity(Intent.createChooser(mIntent, "Send results.")); 
    } 
}

ReflectionUtils.java

import java.lang.reflect.*; 
import android.util.Log; 

public final class ReflectionUtils 
{ 
     public static final String TAG = ReflectionUtils.class.getSimpleName(); 

     /** 
     * Dumps a {@link Class}'s {@link Method}s and {@link Field}s 
     * as a String. 
     */ 
     public static final String dumpClass(Class<?> mClass, Object mInstance) 
     { 
       if (mClass == null || mInstance == null) return null; 

       String mStr = mClass.getSimpleName() + "\n\n"; 

       mStr += "FIELDS\n\n"; 

       final Field[] mFields = mClass.getDeclaredFields(); 

       for (final Field mField : mFields) 
       { 
         mField.setAccessible(true); 

         mStr += mField.getName() + " (" + mField.getType() + ") = "; 

         try 
         { 
           mStr += mField.get(mInstance).toString(); 
         } 
         catch (Exception e) 
         { 
           mStr += "null"; 
           Log.e(TAG, "Could not get Field `" + mField.getName() + "`.", e); 
         } 

         mStr += "\n"; 
       } 

       mStr += "METHODS\\nn"; 

       // Dump all methods. 

       final Method[] mMethods = mClass.getMethods(); 

       for (final Method mMethod : mMethods) 
       { 
         mMethod.setAccessible(true); 

         mStr += mMethod.getReturnType() + " " + mMethod.getName() + "() = "; 

         try 
         { 
           final Object mRet = mMethod.invoke(mInstance); 
           mStr += (mRet == null) ? "null" : mMethod.invoke(mInstance).toString(); 
         } 
         catch (Exception e) 
         { 
           mStr += "null"; 
           Log.e(TAG, "Could not get Method `" + mMethod.getName() + "`.", e); 
         } 

         mStr += "\n"; 
       } 

       return mStr; 
     } 

     /** 
     * @return A string containing the values of all static {@link Field}s. 
     */ 
     public static final String dumpStaticFields(Class<?> mClass, Object mInstance) 
     { 
       if (mClass == null || mInstance == null) return null; 

       String mStr = mClass.getSimpleName() + "\n\n"; 

       mStr += "STATIC FIELDS\n\n"; 

       final Field[] mFields = mClass.getDeclaredFields(); 

       for (final Field mField : mFields) 
       { 
         if (ReflectionUtils.isStatic(mField)) 
         { 
           mField.setAccessible(true); 

           mStr += mField.getName() + " (" + mField.getType() + ") = "; 

           try 
           { 
             mStr += mField.get(mInstance).toString(); 
           } 
           catch (Exception e) 
           { 
             mStr += "null"; 
             Log.e(TAG, "Could not get Field `" + mField.getName() + "`.", e); 
           } 

           mStr += "\n"; 
         } 
       } 

       return mStr; 
     } 

     /** 
     * @return True if the {@link Field} is static. 
     */ 
     public final static boolean isStatic(Field field) 
     { 
      final int modifiers = field.getModifiers(); 
      return (Modifier.isStatic(modifiers)); 
    } 
}

的main.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:orientation="vertical" 
     android:background="@android:color/black" 
     android:padding="8dp" 
     android:id="@+id/root"> 
     <ScrollView 
       xmlns:android="http://schemas.android.com/apk/res/android" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="56dp" 
       android:fillViewport="true"> 
       <LinearLayout 
         android:orientation="vertical" 
         android:layout_width="fill_parent" 
         android:layout_height="fill_parent"> 
         <TextView 
           android:layout_width="fill_parent" 
           android:layout_height="wrap_content" 
           android:id="@+id/text" 
           android:textColor="@android:color/white" /> 
       </LinearLayout> 
     </ScrollView> 
     <TableLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_alignParentBottom="true" 
       android:stretchColumns="0,1"> 
       <TableRow 
         android:layout_width="fill_parent" 
         android:layout_height="wrap_content"> 
         <Button 
           android:id="@+id/cancel" 
           android:layout_width="fill_parent" 
           android:layout_height="wrap_content" 
           android:text="@string/cancel" 
           android:textColor="@android:color/white"/> 
         <Button 
           android:id="@+id/submit" 
           android:layout_width="fill_parent" 
           android:layout_height="wrap_content" 
           android:text="@string/submit" 
           android:textColor="@android:color/white"/> 
       </TableRow> 
     </TableLayout> 
</RelativeLayout>

不要忘記使用下面的功能和權限

<uses-feature android:name="android.hardware.touchscreen" android:required="false" /> 
<uses-feature android:name="android.hardware.location" android:required="false" /> 
    <uses-feature android:name="android.hardware.location.network" android:required="false" /> 
    <uses-feature android:name="android.hardware.location.gps" android:required="false" /> 
<uses-feature android:name="android.hardware.telephony" android:required="false" /> 

<uses-permission android:name="android.permission.ACCESS_WIMAX_STATE" android:required="false" /> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" android:required="false" /> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:required="false" />

來源

2014-01-07 09:32:33

相反評論整個程序，你應該儘量用言語來說話，只張貼必要的代碼。 –

你確定先生。下次會照顧這個！ –

在打出電話之前檢測SIM卡提供商蜂窩塔的強度

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