mainactivity.java
package com.example.codeui1;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
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;
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class MainActivity extends Activity {
public TextView text2;
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FrameLayout frameLayout=new FrameLayout(this);
frameLayout.setBackground(this.getResources().getDrawable(R.drawable.ic_launcher));
setContentView(frameLayout);
TextView text1=new TextView(this);
text1.setText("代码中构建UI界面");
text1.setTextSize(TypedValue.COMPLEX_UNIT_PX,24);
text1.setTextColor(Color.rgb(1,1,1));
frameLayout.addView(text1);
text2=new TextView(this);
text2.setText("单击进入游戏，不要后悔!!!!!!");
text2.setTextSize(TypedValue.COMPLEX_UNIT_PX,24);
text2.setTextColor(Color.rgb(1,1,1));
LayoutParams params=new LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
params.gravity=Gravity.CENTER_HORIZONTAL|Gravity.BOTTOM;
text2.setLayoutParams(params);
text2.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
new Builder(MainActivity.this).setTitle("警告信息")
.setMessage("自我毁灭程序即将启动，确定启动？")
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO 自动生成的方法存根
Log.i("1.1","进入游戏了");
}
}).setNegativeButton("QUIT",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO 自动生成的方法存根
Log.i("1.1","离开游戏了");