如何分享imageview的图像？

Question

我有 ImageView，我想分享它的图像。

以下是我的代码，

btshare.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

                 View content = findViewById(R.id.full_image_view);
                 content.setDrawingCacheEnabled(true);
                     Bitmap bitmap = content.getDrawingCache();
                     File root = Environment.getExternalStorageDirectory();
                     File cachePath = new File(root.getAbsolutePath() + "/DCIM/Camera/image.jpg");
                     try 
                     {
                         root.createNewFile();
                         FileOutputStream ostream = new FileOutputStream(root);
                         bitmap.compress(CompressFormat.JPEG, 100, ostream);
                         ostream.close();
                     } 
                     catch (Exception e) 
                     {
                         e.printStackTrace();
                     }


                 Intent shareIntent = new Intent(Intent.ACTION_SEND);
                 Uri phototUri = Uri.parse("/DCIM/Camera/image.jpg");
                 shareIntent.setData(phototUri);
                 shareIntent.setType("image/*");
                 shareIntent.putExtra(Intent.EXTRA_STREAM, phototUri);
                 startActivity(Intent.createChooser(shareIntent, "Share Via"));

             }  



    });

当我按下按钮时出现这些错误？

01-13 06:00:19.282: W/System.err(6199): java.io.FileNotFoundException: /storage/emulated/0: open failed: EISDIR (Is a directory)
01-13 06:00:19.286: W/System.err(6199):     at libcore.io.IoBridge.open(IoBridge.java:409)
01-13 06:00:19.286: W/System.err(6199):     at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
01-13 06:00:19.294: W/System.err(6199):     at java.io.FileOutputStream.<init>(FileOutputStream.java:73)
01-13 06:00:19.294: W/System.err(6199):     at com.safshari.mandegar.FullImageActivity$3.onClick(FullImageActivity.java:116)
01-13 06:00:19.294: W/System.err(6199):     at android.view.View.performClick(View.java:4240)
01-13 06:00:19.294: W/System.err(6199):     at android.view.View$PerformClick.run(View.java:17721)
01-13 06:00:19.298: W/System.err(6199):     at android.os.Handler.handleCallback(Handler.java:730)
01-13 06:00:19.298: W/System.err(6199):     at android.os.Handler.dispatchMessage(Handler.java:92)
01-13 06:00:19.298: W/System.err(6199):     at android.os.Looper.loop(Looper.java:137)
01-13 06:00:19.302: W/System.err(6199):     at android.app.ActivityThread.main(ActivityThread.java:5103)
01-13 06:00:19.302: W/System.err(6199):     at java.lang.reflect.Method.invokeNative(Native Method)
01-13 06:00:19.302: W/System.err(6199):     at java.lang.reflect.Method.invoke(Method.java:525)
01-13 06:00:19.302: W/System.err(6199):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
01-13 06:00:19.306: W/System.err(6199):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-13 06:00:19.306: W/System.err(6199):     at dalvik.system.NativeStart.main(Native Method)
01-13 06:00:19.310: W/System.err(6199): Caused by: libcore.io.ErrnoException: open failed: EISDIR (Is a directory)
01-13 06:00:19.310: W/System.err(6199):     at libcore.io.Posix.open(Native Method)
01-13 06:00:19.310: W/System.err(6199):     at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
01-13 06:00:19.310: W/System.err(6199):     at libcore.io.IoBridge.open(IoBridge.java:393)
01-13 06:00:19.314: W/System.err(6199):     ... 14 more
01-13 06:00:19.618: E/Genymotion(489): Could not open '/sys/class/power_supply/genymotion_fake_path/present'

我应该做什么以及我的程序需要什么权限？我已经声明了以下权限，

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

Answer 1

最终代码，因此任何人都可以使用 imageview 保存和共享图像：

View content = findViewById(R.id.full_image_view);
                 content.setDrawingCacheEnabled(true);

                     Bitmap bitmap = content.getDrawingCache();
                     File root = Environment.getExternalStorageDirectory();
                     File cachePath = new File(root.getAbsolutePath() + "/DCIM/Camera/image.jpg");
                     try {
                         cachePath.createNewFile();
                         FileOutputStream ostream = new FileOutputStream(cachePath);
                         bitmap.compress(CompressFormat.JPEG, 100, ostream);
                         ostream.close();
                     } catch (Exception e) {
                         e.printStackTrace();
                     }


                     Intent share = new Intent(Intent.ACTION_SEND);
                     share.setType("image/*");
                     share.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(cachePath));
                     startActivity(Intent.createChooser(share,"Share via"));

             }  

快乐编码

Answer 2

试试下面的代码来分享你的图片：

    Intent share = new Intent(Intent.ACTION_SEND);
    share.setType("image/*");
    share.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(new File(root.getAbsolutePath() + "/DCIM/Camera/image.jpg"));
    startActivity(Intent.createChooser(share,"Share via"));

将这些权限添加到AndroidMenifest.xml

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

Answer 3

你需要添加这个权限

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

Answer 4

尝试先创建缓存来存储此图像，然后再共享它，因为您只能共享对其他应用程序也公开的图像。您不能共享对您的应用程序私有的内容。

使用 Context.getExternalCacheDir() 创建缓存，然后共享这个缓存的内容

Answer 5

Bundle intent = getIntent().getExtras();
cardView = (CardView) findViewById(R.id.card);
final String query = intent.getString("Query1");

db = new DataBaseHelper(Image.this);

Cursor c = db.getData(query);

if (c.getCount() != 0) {
    c.moveToFirst();

    do {
        image = c.getString(5);
        title=c.getString(3);
    } while (c.moveToNext());
}

txt.setText(title);

img.setImageDrawable(getResources()
    .getDrawable(getResources().getIdentifier(image, "drawable", getPackageName())));

Answer 6

• 从图像视图中获取位图

imageview.buildDrawingCache();
Bitmap image = mainimg.getDrawingCache();

• 转换网址

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);
}

• 然后分享按钮

Intent share = new Intent(Intent.ACTION_SEND);
share.setType("image/*");
share.putExtra(Intent.EXTRA_STREAM, getImageUri(this,getImageUri));
startActivity(Intent.createChooser(share,"Share via"));