捕获一个图像，并将其传递给另一个活动在android

我已经经历了类似的答案，我想到的是我试图编码我的第一个应用程序。现在我遇到了错误。捕获一个图像，并将其传递给另一个活动在android

我有一个活性，其的onclick调用一个方法（在相应的类中定义）

此方法调用相机，捕捉图像并将其发送到另一个活动用于显示的ImageView的。当我尝试在捕获它的同一活动中显示图像时，它只是正常工作但是当我尝试通过意图传递它时，它会给我错误和错误。

这里是我的代码活性1（fragment_selfin_review.xml）

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:paddingBottom="@dimen/activity_vertical_margin" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
tools:context="com.ardortech.restofun.SelfinReview$PlaceholderFragment" 
android:background="@color/black" 
> 
    <ImageView 
    android:id="@+id/click_selfie" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@id/blank_space" 
    android:layout_centerHorizontal="true" 
    android:contentDescription="@string/click_selfie" 
    android:gravity="center" 
    android:src="@drawable/ic_camera" 
    android:clickable="true" 
    android:onClick="clickSelfie" /> 
</RelativeLayout>

这里是java类

package com.mysite.myapp; 

    import java.io.ByteArrayOutputStream; 
    import java.io.File; 

    import android.app.Activity; 
    import android.content.ContentResolver; 
    import android.content.Intent; 
    import android.graphics.Bitmap; 
    import android.net.Uri; 
    import android.os.Bundle; 
    import android.os.Environment; 
    import android.provider.MediaStore; 
    import android.support.v4.app.Fragment; 
    import android.support.v7.app.ActionBarActivity; 
    import android.view.LayoutInflater; 
    import android.view.Menu; 
    import android.view.MenuItem; 
    import android.view.View; 
    import android.view.ViewGroup; 
    import android.widget.Toast; 
    public class SelfinReview extends ActionBarActivity { 
    public static final int TAKE_PICTURE = 0; 
    private Uri mUri; 
    private Bitmap mPhoto; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_selfin_review); 

     if (savedInstanceState == null) { 
      getSupportFragmentManager().beginTransaction() 
      .add(R.id.container, new PlaceholderFragment()).commit(); 
     } 
    } 
    /** Code for onclick Camera Image Method 
    * 
    */ 

    public void clickSelfie(View v){ 

     Intent i = new Intent("android.media.action.IMAGE_CAPTURE"); 

     File f = new File(Environment.getExternalStorageDirectory(), "photo.jpg"); 
     i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f)); 
     mUri = Uri.fromFile(f); 
     startActivityForResult(i, TAKE_PICTURE); 
    } 

    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent data) { 
      super.onActivityResult(requestCode, resultCode, data); 


      switch (requestCode) { 
      case TAKE_PICTURE: 
       if (resultCode == Activity.RESULT_OK) { 
      getContentResolver().notifyChange(mUri, null); 
        ContentResolver cr = getContentResolver(); 
        try { 
         Intent selfiSrc = new Intent(this,SelfiEdit.class); 
         selfiSrc.putExtra("imgurl", mUri.toString()); 
         startActivity(selfiSrc); 

        } catch (Exception e) { 
         Toast.makeText(this, e.getMessage(),Toast.LENGTH_SHORT).show(); 
         } 

       } 
      } 
    } 

     /** 
    * A placeholder fragment containing a simple view. 
    */ 
    public static class PlaceholderFragment extends Fragment { 

     public PlaceholderFragment() { 
     } 

     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
       Bundle savedInstanceState) { 
      View rootView = inflater.inflate(R.layout.fragment_selfin_review, 
        container, false); 
      return rootView; 
     } 
    }  


    }

以及接收活动的代码，我在这里如何让我的意图

@Override 
    protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_selfi_edit); 
     if (savedInstanceState == null) { 
      getSupportFragmentManager().beginTransaction() 
     .add(R.id.container, new PlaceholderFragment()).commit(); 
     } 
    /** 
    * Receiving image data from the Previous activity 
    */ 
     ImageView previewThumbnail = (ImageView) findViewById(R.id.selfie_holder); 
     String rcvimgpath=getIntent().getStringExtra("imgurl"); 
     previewThumbnail.setImageBitmap(BitmapFactory.decodeFile(rcvimgpath)); 

    }

但是当我运行时，我得到这个错误就像

06-19 08:38:25.108: D/(1112): HostConnection::get() New Host Connection established 
    0xb8eae210, tid 1112 
    06-19 08:38:25.238: W/EGL_emulation(1112): eglSurfaceAttrib not implemented 
    06-19 08:38:25.288: D/OpenGLRenderer(1112): Enabling debug mode 0 
    06-19 08:38:28.438: W/EGL_emulation(1112): eglSurfaceAttrib not implemented 
    06-19 08:38:44.078: W/EGL_emulation(1112): eglSurfaceAttrib not implemented 
    06-19 08:38:44.668: E/BitmapFactory(1112): Unable to decode stream: 
    java.io.FileNotFoundException: /file:/storage/sdcard/photo.jpg: open failed: ENOENT (No 
    such file or directory) 
    06-19 08:38:44.758: D/AndroidRuntime(1112): Shutting down VM 
    06-19 08:38:44.758: W/dalvikvm(1112): threadid=1: thread exiting with uncaught 
    exception (group=0xb4a3fba8) 
    06-19 08:38:45.018: E/AndroidRuntime(1112): FATAL EXCEPTION: main 
    06-19 08:38:45.018: E/AndroidRuntime(1112): Process: com.mysite.myapp, PID: 1112 
    06-19 08:38:45.018: E/AndroidRuntime(1112): java.lang.RuntimeException: Unable to start 
    activity ComponentInfo{com.mysite.myapp/com.mysite.myapp.SelfiEdit}: 
    java.lang.NullPointerException 
    06-19 08:38:45.018: E/AndroidRuntime(1112):at 
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.app.ActivityThread.access$800(ActivityThread.java:135) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.os.Handler.dispatchMessage(Handler.java:102) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.os.Looper.loop(Looper.java:136) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.app.ActivityThread.main(ActivityThread.java:5017) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    java.lang.reflect.Method.invokeNative(Native Method) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    java.lang.reflect.Method.invoke(Method.java:515) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    dalvik.system.NativeStart.main(Native Method) 
    06-19 08:38:45.018: E/AndroidRuntime(1112): Caused by: java.lang.NullPointerException 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    com.mysite.myapp.SelfiEdit.onCreate(SelfiEdit.java:47) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.app.Activity.performCreate(Activity.java:5231) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
    06-19 08:38:45.018: E/AndroidRuntime(1112):  at 
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)

我试图在它被捕获的同一个活动中显示图像，并且像魅力一样工作。但是在将图片网址传递给其他活动时出现错误。

任何人都可以指出我是怎么回事？由于

来源

2014-06-19 echoashu

谢谢@dumazy，但我想用clickSlefie（）为我定制的方法之一。我什至不知道这样的事情存在;-)好吧，让我试试你的建议，并恢复。 – echoashu

我跟在SOF上的一些其他答案线索，并得到了我的问题解决。想知道我是如何发布我的解决方案？我可以回答我自己的问题吗？ – echoashu

更改clickSelfie方法这样

public void clickSelfie() { 
    Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
    startActivityForResult(cameraIntent, TAKE_PICTURE); 
}

onactivityResult这样

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 

    if (requestCode == TAKE_PICTURE && resultCode == RESULT_OK) { 
     Uri u = data.getData(); 
     Intent selfiSrc = new Intent(this, SelfiEdit.class); 
    selfiSrc.putExtra("imgurl", u); 
    startActivity(selfiSrc); 
    }

}

和接收活动的onCreate这样

Bundle extras= getIntent().getExtras(); 
if(extras!=null) 
{ 
    path = (Uri) extras.get("imgurl"); 
} 
ImageView img = (ImageView)findViewById(R.id.click_selfie); 
img.setImageURI(path);

它的工作原理就像一个魅力在我的设备

this can help you more for wide number of devices

来源

2014-06-20 07:17:24

传递一个由于OOM而导致活动强制关闭的位图不是很好的做法，因此在将它传递给其他活动之前，您不会缩放图像，最好的解决方案将从意图获取uri路径并将其传递给其他活动....因为他正在使用onActivityResult .. – k0sh

k0sh您指出正确。我已经尝试了位图方法，但只是不正确。不过，我也更喜欢传球图像uri。让我试试wid @Jiju Induchoodan编辑的答案，然后回复。谢谢 – echoashu

@Jiju Induchoodan，当你尝试你的建议时，在onactivityResult 'Uri u = intent.getData（）;'在月食中给出错误。可能是我们必须首先接受意图吗？所以不寒而栗我把这个 'Intent intent = getIntent（）'然后尝试接收数据？ – echoashu

捕获一个图像，并将其传递给另一个活动在android

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