Android(Java):Android中常用的代码

 

1代码中设置margin

RelativeLayout.LayoutParams margin = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
margin.setMargins(30, 8, 0, 0); 
viewHolder.tvName.setLayoutParams(margin);

 

2圆弧的效果

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
    <solid android:color="@color/areaschildrenselected"/>
    <corners android:radius="8dip" />
</shape> 

 

3onkeydown

@Override
 public boolean dispatchKeyEvent(KeyEvent event) {
  // TODO Auto-generated method stub
  CommonUtils.log(TAG, "onKeyDown");
  if(KeyEvent.ACTION_DOWN==event.getAction()){
   return DoubleBack.doubleBackHanlder(this,event.getKeyCode());
  }
  return false;
 }

 

4得到资源中的asset数据流

InputStream in = getResources().getAssets().open("ehcache.xml");//得到资源中的asset数据流

 

5

if(progressDialog==null){
  progressDialog = new ProgressDialog(mContext);
 }
 progressDialog.setMessage("视频正在加载中，请稍后");
 progressDialog.show();

 

if (progressDialog == null) {
   progressDialog = ProgressDialog.show(this, null, getString(R.string.loginwait), true);
  }
  progressDialog.show();