30條android項目開發(fā)技巧與經(jīng)驗總結(jié)

public static Bitmap stringtoBitmap(String string){
	Bitmap bitmap=null; 
	try { 
		byte[]bitmapArray;
		bitmapArray= Base64.decode(string, Base64.DEFAULT);
		bitmap= BitmapFactory.decodeByteArray(bitmapArray, 0, bitmapArray.length); 
	} catch (Exception e) { 
		e.printStackTrace();
	}
	return bitmap;
}

<!--沉浸式狀態(tài)欄--> 
  <style name="NoActionBarTheme" parent="Theme.AppCompat.Light.NoActionBar"> 
    <!-- Customize your theme here. --> 
    <item name="colorPrimary">@color/colorPrimary</item> 
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item> 
    <item name="colorAccent">@color/colorAccent</item> 
  </style>

  <!--沉浸式狀態(tài)欄--> 
  <style name="NoActionBarTheme" parent="Theme.AppCompat.Light.NoActionBar"> 
    <!-- Customize your theme here. --> 
    <item name="colorPrimary">@color/colorPrimary</item> 
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item> 
    <item name="colorAccent">@color/colorAccent</item> 
    <item name="android:windowTranslucentStatus">true</item> 
  </style>

getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

//回到桌面 
      Intent intent = new Intent(Intent.ACTION_MAIN); 
      intent.addCategory(Intent.CATEGORY_HOME); 
      intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
      startActivity(intent);

textView.setMovementMethod(ScrollingMovementMethod.getInstance()); 

@Override 
protected void onDestroy() { 
  try { 
    if( webView!=null) { 
      ViewParent parent = webView.getParent(); 
      if (parent != null) { 
        ((ViewGroup) parent).removeView(webView); 
      } 
      webView.stopLoading(); 
      // 退出時調(diào)用此方法，移除綁定的服務(wù)，否則某些特定系統(tǒng)會報錯 
      webView.getSettings().setJavaScriptEnabled(false); 
      webView.clearHistory(); 
      webView.clearView(); 
      webView.removeAllViews(); 
      webView.destroy(); 
    } 
  } catch (Exception e) { 
    e.printStackTrace(); 
  } 
  super.onDestroy(); 
} 

WebSettings webSettings = webView.getSettings(); 
 
//支持獲取手勢焦點，輸入用戶名、密碼或其他 
webView.requestFocusFromTouch(); 
 
webSettings.setJavaScriptEnabled(true); //支持js 
//webSettings.setPluginsEnabled(true); //支持插件 
 
//設(shè)置自適應(yīng)屏幕，兩者合用 
webSettings.setUseWideViewPort(true); //將圖片調(diào)整到適合webview的大小 
webSettings.setLoadWithOverviewMode(true); // 縮放至屏幕的大小 
 
 
webSettings.setSupportZoom(true); //支持縮放，默認為true。是下面那個的前提。 
webSettings.setBuiltInZoomControls(true); //設(shè)置內(nèi)置的縮放控件。 
//若上面是false，則該WebView不可縮放，這個不管設(shè)置什么都不能縮放。 
 
webSettings.setDisplayZoomControls(false); //隱藏原生的縮放控件 
 
webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN); //支持內(nèi)容重新布局 
webSettings.supportMultipleWindows(); //多窗口 
webSettings.setCacheMode(WebSettings.LOAD_DEFAULT); //關(guān)閉webview中緩存 
webSettings.setAllowFileAccess(true); //設(shè)置可以訪問文件 
webSettings.setNeedInitialFocus(true); //當webview調(diào)用requestFocus時為webview設(shè)置節(jié)點 
webSettings.setJavaScriptCanOpenWindowsAutomatically(true); //支持通過JS打開新窗口 
webSettings.setLoadsImagesAutomatically(true); //支持自動加載圖片 
webSettings.setDefaultTextEncodingName("utf-8");//設(shè)置編碼格式 
//允許自動播放多媒體 
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { 
  webSettings.setMediaPlaybackRequiresUserGesture(false); 
} 
 
//從Android5.0開始，WebView默認不支持同時加載Https和Http混合模式 
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { 
  webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW); 
} 

Error:Failed to open zip file. 
Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.) 
Re-download dependencies and sync project (requires network)
Re-download dependencies and sync project (requires network)

<EditText 
  android:id="@+id/et_search" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:imeOptions="actionSearch" 
  android:singleLine="true" 
  android:inputType="text"/> 

etSearch.setOnEditorActionListener(new TextView.OnEditorActionListener() { 
  @Override 
  public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { 
    if (actionId == EditorInfo.IME_ACTION_SEARCH) { 
      initData(); 
      return true; 
    } 
    return false; 
  } 
 
});