Hack screenshots for Android >= 5.0 Lollipop

IITC-CE · Apr 21, 2019 · 6677855 · 6677855
1 parent 30b0ff4
commit 6677855
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Showing 2 changed files with 46 additions and 24 deletions.
diff --git a/mobile/app/src/main/java/org/exarhteam/iitc_mobile/IITC_Mobile.java b/mobile/app/src/main/java/org/exarhteam/iitc_mobile/IITC_Mobile.java
@@ -38,6 +38,7 @@
 import android.widget.AdapterView.OnItemLongClickListener;
 import android.widget.EditText;
 import android.widget.ImageButton;
+import android.widget.LinearLayout;
 import android.widget.ListView;
 import android.widget.PopupMenu;
 import android.widget.TextView;
@@ -49,6 +50,7 @@
 import androidx.appcompat.widget.SearchView;
 import androidx.appcompat.widget.Toolbar;
 import androidx.core.view.MenuItemCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
 
 import org.exarhteam.iitc_mobile.IITC_NavigationHelper.Pane;
 import org.exarhteam.iitc_mobile.prefs.PreferenceActivity;
@@ -680,7 +682,7 @@ public boolean onOptionsItemSelected(final MenuItem item) {
                 cm.removeAllCookie();
                 return true;
             case R.id.menu_send_screenshot:
-                sendScreenshot();
+                sendScreenshot(this);
                 return true;
             case R.id.menu_debug:
                 mDebugging = !mDebugging;
@@ -962,32 +964,51 @@ public void setPermalink(final String href) {
         mPermalink = href;
     }
 
-    private void sendScreenshot() {
-        Bitmap bitmap = Bitmap.createBitmap(mIitcWebView.getMeasuredWidth(),
-                mIitcWebView.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
+    private void sendScreenshot(final IITC_Mobile iitc) {
+        Toast.makeText(this, "3…", Toast.LENGTH_SHORT).show();
+        new Handler().postDelayed(() -> Toast.makeText(iitc, "2…", Toast.LENGTH_SHORT).show(), 1000);
+        new Handler().postDelayed(() -> Toast.makeText(iitc, "1…", Toast.LENGTH_SHORT).show(), 2000);
+        new Handler().postDelayed(() -> Toast.makeText(iitc, R.string.msg_take_screenshot, Toast.LENGTH_SHORT).show(), 2900);
 
-        Canvas bigcanvas = new Canvas(bitmap);
-        Paint paint = new Paint();
-        int iHeight = bitmap.getHeight();
-        bigcanvas.drawBitmap(bitmap, 0, iHeight, paint);
-        mIitcWebView.draw(bigcanvas);
+        // Hack for Android >= 5.0 Lollipop
+        // When hardware acceleration is enabled, it is not possible to create a screenshot.
+        // After switch to software render, we need to redraw the webview, but of all the ways I have worked only resizing.
+        // This takes some time, so a timer is set.
+        // After the screenshot is taken, the webview size and render type are returned to their original state.
+        mIitcWebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
+        mIitcWebView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, mIitcWebView.getMeasuredHeight()+50));
 
-        try {
-            final File cache = getExternalCacheDir();
-            final File file = File.createTempFile("IITC screenshot", ".png", cache);
-            if (!bitmap.compress(CompressFormat.PNG, 100, new FileOutputStream(file))) {
-                // quality is ignored by PNG
-                throw new IOException("Could not compress bitmap!");
-            }
-            startActivityForResult(ShareActivity.forFile(this, file, "image/png"), new ResponseHandler() {
-                @Override
-                public void onActivityResult(final int resultCode, final Intent data) {
-                    file.delete();
+        Handler handler = new Handler();
+        handler.postDelayed(() -> {
+            Bitmap bitmap = Bitmap.createBitmap(mIitcWebView.getMeasuredWidth(),
+                    mIitcWebView.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
+
+            Canvas bigcanvas = new Canvas(bitmap);
+            Paint paint = new Paint();
+            int iHeight = bitmap.getHeight();
+            bigcanvas.drawBitmap(bitmap, 0, iHeight, paint);
+
+            mIitcWebView.draw(bigcanvas);
+
+            try {
+                final File cache = getExternalCacheDir();
+                final File file = File.createTempFile("IITC screenshot", ".png", cache);
+                if (!bitmap.compress(CompressFormat.PNG, 100, new FileOutputStream(file))) {
+                    // quality is ignored by PNG
+                    throw new IOException("Could not compress bitmap!");
                 }
-            });
-        } catch (final IOException e) {
-            Log.e("Could not generate screenshot", e);
-        }
+                startActivityForResult(ShareActivity.forFile(iitc, file, "image/png"), (resultCode, data) -> {
+                    mIitcWebView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
+                    mIitcWebView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
+
+                    file.delete();
+                });
+            } catch (final IOException e) {
+                Log.e("Could not generate screenshot", e);
+            }
+
+        }, 3000);
+
     }
 
     @Override

diff --git a/mobile/app/src/main/res/values/strings.xml b/mobile/app/src/main/res/values/strings.xml
@@ -153,6 +153,7 @@
     <string name="search_hint">Search locations</string>
     <string name="intent_error">Address could not be opened</string>
     <string name="msg_copied">Copied to clipboard…</string>
+    <string name="msg_take_screenshot">Takes a screenshot…</string>
     <string name="notice_do_not_show_again">Do not show again</string>
 
     <string name="sign_in_to">Sign in to %1$s %2$s"</string>