问题描述

安卓开发刚起步，控制UI界面时 出现这个问题怎么解决啊 如图

CSDN移动问答
MainActivity。java 代码如下：
package com.example.andrew;

import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.graphics.Color;
import android.util.Log;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.TextView;

public class MainActivity extends Activity {
public TextView text2;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FrameLayout frameLayout=new FrameLayout(this);
frameLayout.setBackgroundDrawable(this.getResources().
getDrawable(TRIM_MEMORY_UI_HIDDEN));//设置背景
setContentView(frameLayout);
TextView text1=new TextView(this);
text1.setText(""在代码中控制UI界面"");
text1.setTextSize(TypedValue.COMPLEX_UNIT_PX 24);
text1.setTextColor(Color.CYAN);
frameLayout.addView(text1);

text2=new TextView(this);
text2.setText(""单击进入游戏界面。。。。"");
text2.setTextSize(TypedValue.COMPLEX_UNIT_PX 24);
text2.setTextColor(Color.GREEN);
LayoutParams params=new LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENTViewGroup.LayoutParams.WRAP_CONTENT);
params.gravity=Gravity.CENTER_HORIZONTAL|Gravity.CENTER_VERTICAL;
text2.setLayoutParams(params);
text2.setOnClickListener(new OnClickListener(){
@ Override
public void onClick(View v){
new AlertDialog.Builder(MainActivity.this).setTitle(""系统提示"")
.setMessage(""游戏有风险"")
.setNegativeButton(""确定""
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog int which) {
// TODO Auto-generated method stub
Log.i(""android""进入游戏"");

}
}).setNegativeButton(""退出""
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog int which) {
// TODO Auto-generated method stub
Log.i(""android""退出游戏"");
finish();
}
}).show();
}
});

frameLayout.addView(text2);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main menu);
return true;
}

}