我正在尝试使用以下代码共享应用程序的屏幕截图：
View content = findViewById(R.id.layoutHome);
content.setDrawingCacheEnabled(true);
Bitmap bitmap = content.getDrawingCache();
File sdCardDirectory = Environment.getExternalStorageDirectory();
File image = new File(sdCardDirectory,"temp.png");
// Encode the file as a PNG image.
FileOutputStream outStream;
try {
outStream = new FileOutputStream(image);
bitmap.compress(Bitmap.CompressFormat.PNG,100,outStream);
outStream.flush();
outStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
String url = "file://" + sdCardDirectory.toString() + "Images/temp.png";
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("image/*");
String shareBody = "Here is the share content body";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT,"Subject Here");
sharingIntent.putExtra(android.content.Intent.EXTRA_STREAM,url);
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT,shareBody);
startActivity(Intent.createChooser(sharingIntent,"Share via"));
logcat的：
10-10 14:20:16.631: W/Bundle(16349): Key android.intent.extra.STREAM expected Parcelable but value was a java.lang.String. The default value <null> was returned. 10-10 14:20:16.658: W/Bundle(16349): Attempt to cast generated internal exception: 10-10 14:20:16.658: W/Bundle(16349): java.lang.ClassCastException: java.lang.String cannot be cast to android.os.Parcelable 10-10 14:20:16.658: W/Bundle(16349): at android.os.Bundle.getParcelable(Bundle.java:1171) 10-10 14:20:16.658: W/Bundle(16349): at android.content.Intent.getParcelableExtra(Intent.java:4140) 10-10 14:20:16.658: W/Bundle(16349): at android.content.Intent.migrateExtraStreamToClipData(Intent.java:6665) 10-10 14:20:16.658: W/Bundle(16349): at android.content.Intent.migrateExtraStreamToClipData(Intent.java:6650) 10-10 14:20:16.658: W/Bundle(16349): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1410) 10-10 14:20:16.658: W/Bundle(16349): at android.app.Activity.startActivityForResult(Activity.java:3351) 10-10 14:20:16.658: W/Bundle(16349): at android.app.Activity.startActivityForResult(Activity.java:3312) 10-10 14:20:16.658: W/Bundle(16349): at android.app.Activity.startActivity(Activity.java:3522) 10-10 14:20:16.658: W/Bundle(16349): at android.app.Activity.startActivity(Activity.java:3490) 10-10 14:20:16.658: W/Bundle(16349): at com.example.simplegraph.EconActivity$DrawerItemClickListener.onItemClick(EconActivity.java:182) 10-10 14:20:16.658: W/Bundle(16349): at android.widget.AdapterView.performItemClick(AdapterView.java:298) 10-10 14:20:16.658: W/Bundle(16349): at android.widget.AbsListView.performItemClick(AbsListView.java:1086) 10-10 14:20:16.658: W/Bundle(16349): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2855) 10-10 14:20:16.658: W/Bundle(16349): at android.widget.AbsListView$1.run(AbsListView.java:3529) 10-10 14:20:16.658: W/Bundle(16349): at android.os.Handler.handleCallback(Handler.java:615) 10-10 14:20:16.658: W/Bundle(16349): at android.os.Handler.dispatchMessage(Handler.java:92) 10-10 14:20:16.658: W/Bundle(16349): at android.os.Looper.loop(Looper.java:137) 10-10 14:20:16.658: W/Bundle(16349): at android.app.ActivityThread.main(ActivityThread.java:4745) 10-10 14:20:16.658: W/Bundle(16349): at java.lang.reflect.Method.invokeNative(Native Method) 10-10 14:20:16.658: W/Bundle(16349): at java.lang.reflect.Method.invoke(Method.java:511) 10-10 14:20:16.658: W/Bundle(16349): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 10-10 14:20:16.658: W/Bundle(16349): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 10-10 14:20:16.658: W/Bundle(16349): at dalvik.system.NativeStart.main(Native Method)
问题：
当我尝试与gmail共享时,gmail被强制关闭.当我尝试与Facebook分享时,Facebook默默地拒绝该帖子.消息传递信使,但是空的.共享无需添加图像即可工作.
解决方法
首先,永远不要使用连接来构建文件路径,更不用说Uri值了.
其次,EXTRA_STREAM应该包含一个Uri,而不是一个String.
第三,既然您知道正确的MIME类型(image / png),请使用它而不是通配符.
第四,永远不要两次建立相同的路径.在这里,您以正确的方式创建文件图像,然后忽略该值.
因此,转储String url行,将image / *替换为image / png,然后修改：
sharingIntent.putExtra(android.content.Intent.EXTRA_STREAM,url);
成为：
sharingIntent.putExtra(android.content.Intent.EXTRA_STREAM,Uri.fromFile(file));
