java.lang.RuntimeException:将结果ResultInfo {who = null,request = 1888,result = 0,data = null}传递给活动失败

Question

我的应用程序允许用户按下按钮,打开相机,他们可以拍照,它将显示在图像视图中.如果用户在相机打开时按下或取消,我会关闭此强制 - 无法将结果ResultInfo {who = null,request = 1888,result = 0,data = null}发送到活动...所以我猜测结果= 0是我需要插入什么才能使此停止力关闭？

以下是我的代码.我知道我忘记了什么,但却无法弄清楚!(不可否认,我大约需要2周的时间学习android开发).谢谢你的帮助!

    private static final int CAMERA_REQUEST = 1888; 
    private ImageView imageView;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    this.imageView = (ImageView)this.findViewById(R.id.photostrippic1);

    ImageView photoButton = (ImageView) this.findViewById(R.id.photostrippic1);



        photoButton.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent cameraIntent = new      Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
            startActivityForResult(cameraIntent, CAMERA_REQUEST); 
        }

    });

  protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if (requestCode == CAMERA_REQUEST) {  
        Bitmap photo = (Bitmap) data.getExtras().get("data"); 
        imageView.setImageBitmap(photo);
    }  

我想我会在那里需要一个"其他",但我不知道这样做.

下面是logcat

    java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1888, result=0, data=null} to activity {photo.booth.app/photo.booth.app.PhotoboothActivity}: java.lang.NullPointerException
    at android.app.ActivityThread.deliverResults(ActivityThread.java:2934)
    at android.app.ActivityThread.handleSendResult(ActivityThread.java:2986)
    at android.app.ActivityThread.access$2000(ActivityThread.java:132)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1068)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:150)
    at android.app.ActivityThread.main(ActivityThread.java:4293)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
    at dalvik.system.NativeStart.main(Native Method)
    Caused by: java.lang.NullPointerException
    at photo.booth.app.PhotoboothActivity.onActivityResult(PhotoboothActivity.java:76)
    at android.app.Activity.dispatchActivityResult(Activity.java:4108)
    at android.app.ActivityThread.deliverResults(ActivityThread.java:2930)
    ... 11 more

Answer 1

添加第一个条件应该有效:

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if(resultCode != RESULT_CANCELED){
        if (requestCode == CAMERA_REQUEST) {  
            Bitmap photo = (Bitmap) data.getExtras().get("data"); 
            imageView.setImageBitmap(photo);
        }
    }
}

Answer 2

对于Kotlin用户,别忘了添加？在data: Intent? 喜欢

public override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {}

Answer 3

如果用户取消请求,则数据将返回为NULL.nullPointerException当你打电话时,线程会抛出一个data.getExtras().get("data");.我想你只需要添加一个条件来检查返回的数据是否为空.

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if (requestCode == CAMERA_REQUEST) {
       if (data != null)
       {         
           Bitmap photo = (Bitmap) data.getExtras().get("data"); 
           imageView.setImageBitmap(photo);
       }
}  

Answer 4

我建议使用这个:

1. 找回父亲Intent.

   Intent intentParent = getIntent();
   

2. 直接传达信息.

   setResult(RESULT_OK, intentParent);
   

这可以防止丢失其活动,从而产生空数据错误.

Answer 5

对于Kotlin用户

你只需要添加？如果用户取消事务或出现任何问题,onActivityResult可以使用Intent in 作为数据null.因此,我们需要定义数据nullable中onActivityResult

只需onActivityResult用以下代码替换SampleActivity的签名:

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?)