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BaseActivity: flush themed icon cache on theme change

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The most terrible hack you have ever seen.

The drawable cache isn't properly flushed when changing the theme -- a
frameworks bug, evidently -- so we work around it by digging deep into
the mud.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2018-06-01 16:45:56 +02:00
parent 1e45898d70
commit 3d57eb633e
1 changed files with 18 additions and 0 deletions
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18
app/src/main/java/com/wireguard/android/activity/BaseActivity.java
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@ -11,6 +11,7 @@ import android.databinding.CallbackRegistry;
import android.databinding.CallbackRegistry.NotifierCallback; import android.databinding.CallbackRegistry.NotifierCallback;
import android.os.Bundle; import android.os.Bundle;
import android.support.v7.app.AppCompatActivity; import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import com.wireguard.android.Application; import com.wireguard.android.Application;
import com.wireguard.android.backend.GoBackend; import com.wireguard.android.backend.GoBackend;
@ -18,6 +19,7 @@ import com.wireguard.android.model.Tunnel;
import com.wireguard.android.model.TunnelManager; import com.wireguard.android.model.TunnelManager;
import com.wireguard.android.util.Topic; import com.wireguard.android.util.Topic;
import java.lang.reflect.Field;
import java.util.Objects; import java.util.Objects;
/** /**
@ -25,6 +27,8 @@ import java.util.Objects;
*/ */
public abstract class BaseActivity extends AppCompatActivity implements Topic.Subscriber { public abstract class BaseActivity extends AppCompatActivity implements Topic.Subscriber {
private static final String TAG = "WireGuard/" + BaseActivity.class.getSimpleName();
private static final String KEY_SELECTED_TUNNEL = "selected_tunnel"; private static final String KEY_SELECTED_TUNNEL = "selected_tunnel";
private final SelectionChangeRegistry selectionChangeRegistry = new SelectionChangeRegistry(); private final SelectionChangeRegistry selectionChangeRegistry = new SelectionChangeRegistry();
@ -117,6 +121,20 @@ public abstract class BaseActivity extends AppCompatActivity implements Topic.Su
@Override @Override
public void onTopicPublished(Topic topic) { public void onTopicPublished(Topic topic) {
try {
Field f = getResources().getClass().getDeclaredField("mResourcesImpl");
f.setAccessible(true);
Object o = f.get(getResources());
f = o.getClass().getDeclaredField("mDrawableCache");
f.setAccessible(true);
o = f.get(o);
f = o.getClass().getSuperclass().getDeclaredField("mThemedEntries");
f.setAccessible(true);
o = f.get(o);
o.getClass().getMethod("clear").invoke(o);
} catch (Exception e) {
Log.e(TAG, "Failed to flush icon cache", e);
}
recreate(); recreate();
} }