Android加载数据过程中的菊花显示

LinearLayout mProgressLayout=new LinearLayout(this);
mProgressLayout.setMinimumHeight(30);
mProgressLayout.setGravity(Gravity.CENTER);
mProgressLayout.setOrientation(LinearLayout.HORIZONTAL);
LayoutParams mLayoutParams=new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);
ProgressBar mProgressBar=new ProgressBar(this);
mProgressBar.setPadding(100, 250, 5, 80);
mProgressLayout.addView(mProgressBar,mLayoutParams);
TextView mContent=new TextView(this);
mContent.setText("加载中...");
mContent.setTextSize(19);
mContent.setTextColor(Color.BLACK);
mContent.setPadding(0, 250, 0, 80);
mProgressLayout.addView(mContent, mLayoutParams);
mProgressLayout.setVisibility(View.VISIBLE);
MsgConditionActivity.this.addContentView(mProgressLayout, mLayoutParams);