在Android中支持高支持的圖片尺寸

我有拍照的相機應用程序。我的問題是，當我拍攝240 * 320的照片時，我的相機可以拍攝高清照片。我怎樣才能拍攝高質量的照片？我試試這個代碼：在Android中支持高支持的圖片尺寸

public void GetHighResolutionForCamera(){ 
    int Max = 0; 
    Camera.Size MR = null ; 
    Parameters params = mCamera.getParameters(); 
    List<Camera.Size> resolution ; 
    resolution = params.getSupportedPictureSizes(); 
    for (Camera.Size size : resolution) { 
     if(Max < size.height){ 
      MR = size ; 
      Max = size.height; 
     } 
    } 
    params.setPictureSize(MR.width, MR.height); 
    mCamera.setParameters(params); 
}

但我試圖設置參數時出錯。這與表面視圖有關嗎？當我可以設置參數到我的相機？

這是logcat的：

08-21 22:21:27.442: D/AndroidRuntime(27812): Shutting down VM 
08-21 22:21:27.442: W/dalvikvm(27812): threadid=1: thread exiting with uncaught exception (group=0x41a5e700) 
08-21 22:21:27.458: E/AndroidRuntime(27812): FATAL EXCEPTION: main 
08-21 22:21:27.458: E/AndroidRuntime(27812): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mytackpicture/com.example.mytackpicture.MainActivity}: java.lang.NullPointerException 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.os.Handler.dispatchMessage(Handler.java:99) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.os.Looper.loop(Looper.java:137) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.app.ActivityThread.main(ActivityThread.java:5103) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at java.lang.reflect.Method.invokeNative(Native Method) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at java.lang.reflect.Method.invoke(Method.java:525) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at dalvik.system.NativeStart.main(Native Method) 
08-21 22:21:27.458: E/AndroidRuntime(27812): Caused by: java.lang.NullPointerException 
08-21 22:21:27.458: E/AndroidRuntime(27812): at com.example.mytackpicture.MainActivity.GetHighResolutionForCamera(MainActivity.java:63) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at com.example.mytackpicture.MainActivity.onCreate(MainActivity.java:57) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.app.Activity.performCreate(Activity.java:5133) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
08-21 22:21:27.458: E/AndroidRuntime(27812): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 
08-21 22:21:27.458: E/AndroidRuntime(27812): ... 11 more

來源

2013-08-21 Saber Solooki

你什麼錯誤？ Logcat輸出將非常有用。 – Geobits

感謝您的回覆。已更新 –

什麼是第63行？ 'mCamera'爲空嗎？ – Geobits

它的解決和它的糾正方法：

public void GetHighResolutionForCamera(){ 
    int Max = 0; 
    Parameters params = mCamera.getParameters(); 
    List<Camera.Size> resolution ; 
    resolution = params.getSupportedPictureSizes(); 
    Camera.Size MR = resolution.get(0); 
    for (Camera.Size size : resolution) { 
     if(Max < size.height){ 
      MR = size ; 
      Max = size.height; 
     } 
    } 
    params.setPictureSize(MR.width, MR.height); 
    mCamera.setParameters(params); 
}

問題，因爲MR爲空

來源

2013-08-22 18:17:11

在Android中支持高支持的圖片尺寸

回答

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