package de.danoeh.antennapod.activity; import android.content.res.TypedArray; import android.graphics.Color; import android.os.Build; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.MenuItem; import android.view.View; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.LinearLayout; import org.apache.commons.io.IOUtils; import java.io.IOException; import java.io.InputStream; import java.nio.charset.Charset; import de.danoeh.antennapod.R; import de.danoeh.antennapod.core.preferences.UserPreferences; import rx.Observable; import rx.Subscriber; import rx.Subscription; import rx.android.schedulers.AndroidSchedulers; import rx.schedulers.Schedulers; /** * Displays the 'about' screen */ public class AboutActivity extends AppCompatActivity { private static final String TAG = AboutActivity.class.getSimpleName(); private WebView webview; private LinearLayout webviewContainer; private int depth = 0; private Subscription subscription; @Override protected void onCreate(Bundle savedInstanceState) { setTheme(UserPreferences.getTheme()); super.onCreate(savedInstanceState); getSupportActionBar().setDisplayShowHomeEnabled(true); setContentView(R.layout.about); webviewContainer = (LinearLayout) findViewById(R.id.webvContainer); webview = (WebView) findViewById(R.id.webvAbout); webview.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE); if (UserPreferences.getTheme() == R.style.Theme_AntennaPod_Dark) { if (Build.VERSION.SDK_INT >= 11 && Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) { webview.setLayerType(View.LAYER_TYPE_SOFTWARE, null); } webview.setBackgroundColor(Color.TRANSPARENT); } webview.setWebViewClient(new WebViewClient() { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { if(url.startsWith("http")) { depth++; return false; } else { url = url.replace("file:///android_asset/", ""); loadAsset(url); return true; } } }); loadAsset("about.html"); } private void loadAsset(String filename) { subscription = Observable.create(new Observable.OnSubscribe() { @Override public void call(Subscriber subscriber) { InputStream input = null; try { TypedArray res = AboutActivity.this.getTheme().obtainStyledAttributes( new int[] { android.R.attr.textColorPrimary }); int colorResource = res.getColor(0, 0); String colorString = String.format("#%06X", 0xFFFFFF & colorResource); res.recycle(); input = getAssets().open(filename); String webViewData = IOUtils.toString(input, Charset.defaultCharset()); if(!webViewData.startsWith("")) { //webViewData = webViewData.replace("\n\n", "

"); webViewData = webViewData.replace("%", "%"); webViewData = "" + "" + "" + " " + " " + "

" + webViewData + "

"; webViewData = webViewData.replace("\n", "
"); depth++; } else { depth = 0; } webViewData = String.format(webViewData, colorString); subscriber.onNext(webViewData); } catch (IOException e) { subscriber.onError(e); } finally { IOUtils.closeQuietly(input); } subscriber.onCompleted(); } }) .subscribeOn(Schedulers.newThread()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( webviewData -> webview.loadDataWithBaseURL("file:///android_asset/", webviewData, "text/html", "utf-8", "about:blank"), error -> Log.e(TAG, Log.getStackTraceString(error)) ); } @Override public void onBackPressed() { Log.d(TAG, "depth: " + depth); if(depth == 1) { loadAsset("about.html"); } else if(depth > 1) { webview.goBack(); } else { super.onBackPressed(); } } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { onBackPressed(); return true; } else { return super.onOptionsItemSelected(item); } } @Override protected void onDestroy() { super.onDestroy(); if(subscription != null) { subscription.unsubscribe(); } if (webviewContainer != null && webview != null) { webviewContainer.removeAllViews(); webview.destroy(); } } }