Question

我尝试使用以下代码将图像共享给WhatsApp。现在，我手动添加了图像路径。

当用户点击我的应用程序中的按钮时，我想打开图库，他必须能够选择要在WhatsApp中共享的图像。

我该怎么做？

PS：我需要动态设置图像路径

button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Toast.makeText(MainActivity.this, "Testing Button", Toast.LENGTH_SHORT).show();

        File f=new File("/sdcard/Download/myimage.jpg");
        Uri uri = Uri.parse("file://"+f.getAbsolutePath());
        Intent share = new Intent(Intent.ACTION_SEND);
        share.setPackage("com.whatsapp");
        share.putExtra(Intent.EXTRA_STREAM, uri);
        share.setType("image/*");
        share.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        v.getContext().startActivity(Intent.createChooser(share, "Share image File"));
    }
});

Answer 1

您可以使用以下代码动态获取图像Uri。它适用于所有版本的Android。

<强> MainActivity

public class MainActivity extends Activity {

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


        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.setType("image/*");
        startActivityForResult(intent, 0);
    }

    @Override
     protected void onActivityResult(int reqCode, int resCode, Intent data) {
        if(resCode == Activity.RESULT_OK && data != null){
            String realPath;

            if (Build.VERSION.SDK_INT < 11)
                realPath = RealPathUtil.getRealPathFromURI_BelowAPI11(this, data.getData());


            else if (Build.VERSION.SDK_INT < 19)
                realPath = RealPathUtil.getRealPathFromURI_API11to18(this, data.getData());


            else
                realPath = RealPathUtil.getRealPathFromURI_API19(this, data.getData());


            getImageInfo(Build.VERSION.SDK_INT, data.getData().getPath(),realPath);
        }
    }

    private void getImageInfo(int sdk, String uriPath,String realPath){

        Uri uriFromPath = Uri.fromFile(new File(realPath));
        Log.d("Log", "Build.VERSION.SDK_INT:"+sdk);
        Log.d("Log", "URI Path:"+uriPath);
        Log.d("Log", "Real Path: "+realPath);
    }
}

<强> RealPathUtil.java

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.CursorLoader;
import android.database.Cursor;
import android.net.Uri;
import android.provider.DocumentsContract;
import android.provider.MediaStore;

public class RealPathUtil {

    @SuppressLint("NewApi")
    public static String getRealPathFromURI_API19(Context context, Uri uri){
        String filePath = "";
        String wholeID = DocumentsContract.getDocumentId(uri);

         // Split at colon, use second item in the array
         String id = wholeID.split(":")[1];

         String[] column = { MediaStore.Images.Media.DATA };     

         // where id is equal to             
         String sel = MediaStore.Images.Media._ID + "=?";

         Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, 
                                   column, sel, new String[]{ id }, null);

         int columnIndex = cursor.getColumnIndex(column[0]);

         if (cursor.moveToFirst()) {
             filePath = cursor.getString(columnIndex);
         }   
         cursor.close();
         return filePath;
    }


    @SuppressLint("NewApi")
    public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
          String[] proj = { MediaStore.Images.Media.DATA };
          String result = null;

          CursorLoader cursorLoader = new CursorLoader(
                  context, 
            contentUri, proj, null, null, null);        
          Cursor cursor = cursorLoader.loadInBackground();

          if(cursor != null){
           int column_index = 
             cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
           cursor.moveToFirst();
           result = cursor.getString(column_index);
          }
          return result;  
    }

    public static String getRealPathFromURI_BelowAPI11(Context context, Uri contentUri){
               String[] proj = { MediaStore.Images.Media.DATA };
               Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
               int column_index
          = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
               cursor.moveToFirst();
               return cursor.getString(column_index);
    }
}

将此权限添加到Manifest.xml

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

在Android 6+中，您需要在运行时请求权限。

如何以编程方式从Gallery共享图像到WhatsApp？

1 个答案: