應用程序崩潰使用yalantis uCrop圖書館

Question

導入Yalantis uCrop到項目，當我要剪切圖像，並調用庫方法的logcat後顯示NullPointerException 裁剪方法是：

private void doCrop(){ 
    LTH.dLog(PHOTO_TAG, "Do Crop -> PICK FROM FILE : " + getRealPathFromURI(mImageCaptureUri)); 
    UCrop.of(mImageCaptureUri, mImageCaptureUri/*getUriFromPath()*/) 
      .withAspectRatio(16, 9) 
      .withMaxResultSize(UI.width, UI.height) 
      .start(PurchaseActivity.this); 
} 
private String getRealPathFromURI(Uri contentURI) { 
    String path; 
    Cursor cursor = getContentResolver() 
      .query(contentURI, null, null, null, null); 
    if (cursor == null) 
     path=contentURI.getPath(); 

    else { 
     cursor.moveToFirst(); 
     int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); 
     path=cursor.getString(idx); 

    } 
    if(cursor!=null) 
     cursor.close(); 
    return path; 
} 
private Uri getUriFromPath(){ 
    String DIR_SDCARD = Environment.getExternalStorageDirectory().getAbsolutePath(); 
    String DIR_APP = DIR_SDCARD + "/Android/data/" + App.getContext().getPackageName() + "/"+App.getString(App.getContext(), R.string.dir_app)+"/"; 
    String DIR_CAPTURE = DIR_APP + App.getString(App.getContext(), R.string.dir_capture); 
    new File(DIR_APP).mkdirs(); 
    new File(DIR_APP+DIR_CAPTURE).mkdirs(); 
    final String IMG_DIR = DIR_APP+DIR_CAPTURE+"/"; 
    Uri pathUri = Uri.fromFile(new File(IMG_DIR)); 
    LTH.dLog(PHOTO_TAG, "get Uri From Path -> Uri : "+getRealPathFromURI(pathUri)+" \t "+pathUri); 
    return pathUri; 
} 

錯誤日誌：

03-06 16:46:20.784 21117-21117/com.emaarit.app.erbgroup E/AndroidRuntime﹕ FATAL EXCEPTION: main 
Process: com.emaarit.app.erbgroup, PID: 21117 
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.emaarit.app.erbgroup/com.yalantis.ucrop.UCropActivity}: java.lang.NullPointerException 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2377) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429) 
     at android.app.ActivityThread.access$800(ActivityThread.java:151) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1342) 
     at android.os.Handler.dispatchMessage(Handler.java:110) 
     at android.os.Looper.loop(Looper.java:193) 
     at android.app.ActivityThread.main(ActivityThread.java:5333) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:515) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:828) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:644) 
     at dalvik.system.NativeStart.main(Native Method) 
Caused by: java.lang.NullPointerException 
     at com.yalantis.ucrop.UCropActivity.setupViews(UCropActivity.java:235) 
     at com.yalantis.ucrop.UCropActivity.onCreate(UCropActivity.java:99) 
     at android.app.Activity.performCreate(Activity.java:5343) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2331) 

所以我不知道如何修復它

Answer 1

使用UCrop.Options：

UCrop.Options options = new UCrop.Options(); 
UCrop.of(uri, mImageCaptureUri) 
    .withAspectRatio(10, 10) 
    .withMaxResultSize(Width, Height) 
    .withOptions(options) 
    .start(this);