I am trying to add a share button to my app which takes the screenshot of screen and then shares it via Facebook etc. I have searched over internet. I also have searched Stack Overflow too; there are many threads related with this issue but I couldn't figure that out yet. What is confusing me is .. In every example the image's filepath is hardcoded. I did like that but it is not useful and dynamic. What I am trying to do is to take the screenshot of that moment and then share it, but when I give the filepath by myself it just takes that picture from a folder and shares that
public void clickButton(View v) {
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
//set the type
shareIntent.setType("image/png");
//add a subject
shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT,
"CAR EXAMPLE");
//build the body of the message to be shared
String shareMessage = "An app...";
//add the message
shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareMessage);
//add the img
shareIntent.putExtra(Intent.EXTRA_STREAM,
Uri.parse("/storage/sdcard0/Tutorial_ScreenShot/screenshot0.jpg"));
//start the chooser for sharing
startActivity(Intent.createChooser(shareIntent, "Share"));
}
As you can see in the add image part I give the filepath by myself. So how to give a more dynamic behaviour to that .. I mean when I click the button my app's screen has to be saved in a folder and then I can share that without hardcoding its filepath.
Edited: After trying the solution below;
Well, thanks. I've called shareIt() right under onClick of a button it and application stops... Here is the log.
12-28 15:53:01.660: E/AndroidRuntime(14120): FATAL EXCEPTION: main
12-28 15:53:01.660: E/AndroidRuntime(14120): Process: com.hede.namesurfer, PID: 14120
12-28 15:53:01.660: E/AndroidRuntime(14120): java.lang.NullPointerException
12-28 15:53:01.660: E/AndroidRuntime(14120): at
com.hede.namesurfer.MainActivity.share(MainActivity.java:161)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
com.hede.namesurfer.MainActivity$1.onClick(MainActivity.java:42)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
android.view.View.performClick(View.java:4438)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
android.view.View$PerformClick.run(View.java:18422)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
android.os.Handler.handleCallback(Handler.java:733)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
android.os.Handler.dispatchMessage(Handler.java:95)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
android.os.Looper.loop(Looper.java:136)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
android.app.ActivityThread.main(ActivityThread.java:5017)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
java.lang.reflect.Method.invokeNative(Native Method)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
java.lang.reflect.Method.invoke(Method.java:515)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
12-28 15:53:01.660: E/AndroidRuntime(14120): at
dalvik.system.NativeStart.main(Native Method)
12-28 15:53:02.780: I/Process(14120): Sending signal. PID
Try this
public void shareit()
{
View view = findViewById(R.id.layout);//your layout id
view.getRootView();
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state))
{
File picDir = new File(Environment.getExternalStorageDirectory()+ "/myPic");
if (!picDir.exists())
{
picDir.mkdir();
}
view.setDrawingCacheEnabled(true);
view.buildDrawingCache(true);
Bitmap bitmap = view.getDrawingCache();
// Date date = new Date();
String fileName = "mylove" + ".jpg";
File picFile = new File(picDir + "/" + fileName);
try
{
picFile.createNewFile();
FileOutputStream picOut = new FileOutputStream(picFile);
bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), (int)(bitmap.getHeight()/1.2));
boolean saved = bitmap.compress(CompressFormat.JPEG, 100, picOut);
if (saved)
{
Toast.makeText(getApplicationContext(), "Image saved to your device Pictures "+ "directory!", Toast.LENGTH_SHORT).show();
} else
{
//Error
}
picOut.close();
}
catch (Exception e)
{
e.printStackTrace();
}
view.destroyDrawingCache();
// share via intent
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("image/jpeg");
sharingIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(picFile.getAbsolutePath()));
startActivity(Intent.createChooser(sharingIntent, "Share via"));
} else {
//Error
}
}
for screeshot
public Bitmap takeScreenshot() {
View rootView = findViewById(android.R.id.content).getRootView();
rootView.setDrawingCacheEnabled(true);
return rootView.getDrawingCache(); }
for saving screenshot
private void saveBitmap(Bitmap bitmap) {
imagePath = new File(Environment.getExternalStorageDirectory() + "/scrnshot.png"); ////File imagePath
FileOutputStream fos;
try {
fos = new FileOutputStream(imagePath);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
Log.e("GREC", e.getMessage(), e);
} catch (IOException e) {
Log.e("GREC", e.getMessage(), e);
}}
and for sharing
private void shareIt() {
Uri uri = Uri.fromFile(imagePath);
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("image/*");
String shareBody = "My highest score with screen shot";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "My Catch score");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
sharingIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(sharingIntent, "Share via"));}
and add these method on click
shareScoreCatch.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Bitmap bitmap = takeScreenshot();
saveBitmap(bitmap);
shareIt();
}
});
and in manifest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
For anybody that may need a solution to this in the future, this is what I use in my apps. Tested and working on Android 4.0 to 7.1.
First, define the variable for the visible screen in your Activity:
public View preView;
Then initiate the view to allow for a screenshot:
preView = getWindow().getDecorView();
Then you can call the following method within your Activity upon clicking a button. I place this method in a headless class and reference it as needed.
public static void takeScreenShotAndShare(final Context context, View view, boolean incText, String text){
try{
File mPath = new File(context.getExternalFilesDir(Environment.DIRECTORY_PICTURES), "screenshot.png");
//File imageDirectory = new File(mPath, "screenshot.png");
view.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
view.setDrawingCacheEnabled(false);
FileOutputStream fOut = new FileOutputStream(mPath);
int quality = 100;
bitmap.compress(Bitmap.CompressFormat.PNG, quality, fOut);
fOut.flush();
fOut.close();
final Intent shareIntent = new Intent(Intent.ACTION_SEND);
Uri pictureUri = Uri.fromFile(mPath);
shareIntent.setType("image/*");
if(incText){
shareIntent.putExtra(Intent.EXTRA_TEXT, text);
}
shareIntent.putExtra(Intent.EXTRA_STREAM, pictureUri);
shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
context.startActivity(Intent.createChooser(shareIntent, "Share image using"));
}catch (Throwable tr){
Log.d(TAG, "Couldn't save screenshot", tr);
}
}
尝试将行添加到清单文件中
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
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