如何通过图像路径作为参数用于将图像从相机

Question

我传递图片作为参数在这个函数中采取：

twitt.shareToTwitter（string_msg，casted_image）; 从画廊（无效chintan.khetiya.android.Twitter_code.Twitt_Sharing.shareToTwitter（弦乐味精，文件IMAGE_URL））

现在，这里我选择的形象，但现在我想从凸轮采取事先知情同意和通过。怎么做。？

下面是完整的代码：

public class MainActivity extends Activity { 

// Replace your KEY here and Run , 
public final String consumer_key = "trWwomp0b09ER2A8H1cQg"; 
public final String secret_key = "PAC3E3CtcPcTuPl9VpCuzY6eDD8hPZPwp6gRDCviLs"; 
File casted_image; 

String string_img_url = null, string_msg = null; 
Button btn, pick, cam; 
EditText et; 
ImageView iv; 
private static int RESULT_LOAD_IMAGE = 1; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    try { 
     setContentView(R.layout.main); 

     iv = (ImageView) findViewById(R.id.imageView1); 

     pick = (Button) findViewById(R.id.button1); 
     pick.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       Intent i = new Intent(
         Intent.ACTION_PICK, 
         android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 

       startActivityForResult(i, 1); 
      } 
     }); 

     cam = (Button) findViewById(R.id.button2); 
     cam.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       Intent takePicture = new Intent(
         MediaStore.ACTION_IMAGE_CAPTURE); 
       startActivityForResult(takePicture, 0); 
      } 
     }); 

     btn = (Button) findViewById(R.id.btn); 
     btn.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       onClickTwitt(); 
      } 
     }); 
    } catch (Exception e) { 
     // TODO: handle exception 
     runOnUiThread(new Runnable() { 
      public void run() { 
       showToast("View problem"); 
      } 
     }); 

    } 
} 

public void Call_My_Blog(View v) { 
    Intent intent = new Intent(MainActivity.this, My_Blog.class); 
    startActivity(intent); 

} 

// Here you can pass the string message & image path which you want to share 
// in Twitter. 
public void onClickTwitt() { 
    if (isNetworkAvailable()) { 
     Twitt_Sharing twitt = new Twitt_Sharing(MainActivity.this, 
       consumer_key, secret_key); 

     et = (EditText) findViewById(R.id.editText1); 
     string_msg = et.getText().toString(); 

     twitt.shareToTwitter(string_msg, casted_image); 

    } else { 
     showToast("No Network Connection Available !!!"); 
    } 
} 

// when user will click on twitte then first that will check that is 
// internet exist or not 
public boolean isNetworkAvailable() { 
    ConnectivityManager connectivity = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
    if (connectivity == null) { 
     return false; 
    } else { 
     NetworkInfo[] info = connectivity.getAllNetworkInfo(); 
     if (info != null) { 
      for (int i = 0; i < info.length; i++) { 
       if (info[i].getState() == NetworkInfo.State.CONNECTED) { 
        return true; 
       } 
      } 
     } 
    } 
    return false; 
} 

private void showToast(String msg) { 
    Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show(); 

} 

protected void onActivityResult(int requestCode, int resultCode, 
     Intent imageReturnedIntent) { 
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

    switch (requestCode) { 
    case 0: 
     if (resultCode == RESULT_OK) { 
      Uri selectedImage = imageReturnedIntent.getData(); 
      String[] filePathColumn = { MediaStore.Images.Media.DATA }; 

      Cursor cursor = getContentResolver().query(selectedImage, 
        filePathColumn, null, null, null); 
      cursor.moveToFirst(); 
      int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
      // file path of captured image 
      String filePath = cursor.getString(columnIndex); 
      // file path of captured image 
      casted_image = new File(filePath); 

     } 
     break; 
    case 1: 
     if (requestCode == 1 && resultCode == RESULT_OK 
       && null != imageReturnedIntent) { 
      Uri selectedImage = imageReturnedIntent.getData(); 
      String[] filePathColumn = { MediaStore.Images.Media.DATA }; 

      Cursor cursor = getContentResolver().query(selectedImage, 
        filePathColumn, null, null, null); 
      cursor.moveToFirst(); 

      int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
      String picturePath = cursor.getString(columnIndex); 
      casted_image = new File(picturePath); 
      cursor.close(); 
      iv.setImageURI(selectedImage); 
      // String picturePath contains the path of selected Image 
      break; 
     } 
    } 
} 
} 

log.txt的：

09-10 16:42:26.672: E/AndroidRuntime(1888): FATAL EXCEPTION: main 
09-10 16:42:26.672: E/AndroidRuntime(1888): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent { act=inline-data (has extras) }} to activity {chintan.khetiya.android.Twitter_sharing/chintan.khetiya.android.Twitter_sharing.MainActivity}: java.lang.NullPointerException 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.app.ActivityThread.deliverResults(ActivityThread.java:2532) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.app.ActivityThread.access$2000(ActivityThread.java:117) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.os.Handler.dispatchMessage(Handler.java:99) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.os.Looper.loop(Looper.java:123) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.app.ActivityThread.main(ActivityThread.java:3683) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at java.lang.reflect.Method.invoke(Method.java:507) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at dalvik.system.NativeStart.main(Native Method) 
09-10 16:42:26.672: E/AndroidRuntime(1888): Caused by: java.lang.NullPointerException 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.content.ContentResolver.acquireProvider(ContentResolver.java:743) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.content.ContentResolver.query(ContentResolver.java:256) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at chintan.khetiya.android.Twitter_sharing.MainActivity.onActivityResult(MainActivity.java:155) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.app.Activity.dispatchActivityResult(Activity.java:3908) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  at android.app.ActivityThread.deliverResults(ActivityThread.java:2528) 
09-10 16:42:26.672: E/AndroidRuntime(1888):  ... 11 more 

Answer 1

意图：

Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
startActivityForResult(takePicture, 0); 

要获取该结果：

protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

    switch(requestCode) { 
    case 0: 
     if (requestCode == 0 && resultCode == RESULT_OK) { 
     Bitmap photo = (Bitmap) data.getExtras().get("data");   
     // CALL THIS METHOD TO GET THE URI FROM THE BITMAP 
     Uri tempUri = getImageUri(getApplicationContext(), photo); 
     // CALL THIS METHOD TO GET THE ACTUAL PATH 
     casted_image = new File(getRealPathFromURI(tempUri)); 
     System.out.println(tempUri); 
    } 
    break; 
    case 1: 
     //handle gallery code here 

     break; 
    } 
} 

public Uri getImageUri(Context inContext, Bitmap inImage) { 
    ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 
    inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes); 
    String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null); 
    return Uri.parse(path); 
} 

public String getRealPathFromURI(Uri uriTemp) { 
    Cursor cursor = getContentResolver().query(uriTemp, null, null, null, null); 
    cursor.moveToFirst(); 
    int mIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); 
    return cursor.getString(mIndex); 
} 

将这添加到您的manifest.xml中。

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.CAMERA" /> 

<uses-feature android:name="android.hardware.camera" /> 
<uses-feature android:name="android.hardware.camera.autofocus" /> 

Answer 2

要求一个特定的文件位置的摄像头，你必须这样做：

 Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    cameraCaptureLocation = new File("... location goes here ..."); 
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(cameraCaptureLocation)); 
    startActivityForResult(intent, REQUEST_CAMERA); 

但是有一个问题，因为我使用的两个凸轮和画廊在同一地方，onActivityResult函数已经在那里。现在做什么。？

那么您必须使用requestCode来过滤活动结果来自哪里。你传递一个整数为REQUEST_CAMERA，另一个为REQUEST_GALLERY