当ListView Empty的时候显示提示语

TextView tv=new TextView(this);

tv.setText("未查询到结果");

tv.setGravity(Gravity.CENTER);
searchResultlistView.setEmptyView(tv);
LayoutParams params = new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT);

addContentView(tv, params);

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