android MainActivity

 1 package com.example.ubuntu.myapplication;
 2 
 3 import android.content.DialogInterface;
 4 import android.graphics.Color;
 5 import android.preference.DialogPreference;
 6 import android.support.v7.app.ActionBar;
 7 import android.support.v7.app.AlertDialog;
 8 import android.support.v7.app.AppCompatActivity;
 9 import android.os.Bundle;
10 import android.text.Layout;
11 import android.util.Log;
12 import android.util.TypedValue;
13 import android.view.Gravity;
14 import android.view.View;
15 import android.view.ViewGroup;
16 import android.widget.Button;
17 import android.widget.EditText;
18 import android.widget.FrameLayout;
19 import android.widget.LinearLayout;
20 import android.widget.TextView;
21 
22 public class MainActivity extends AppCompatActivity {
23     public TextView text2;
24 
25     @Override
26 
27     protected void onCreate(Bundle savedInstanceState) {
28         super.onCreate(savedInstanceState);
29 //        setContentView(R.layout.activity_main);
30 //        setContentView(R.layout.framelayout);
31         FrameLayout frameLayout = new FrameLayout(this);
32         FrameLayout.LayoutParams params=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
33                 ViewGroup.LayoutParams.MATCH_PARENT);//定义框架布局器参数
34         FrameLayout.LayoutParams t1params=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
35                 ViewGroup.LayoutParams.WRAP_CONTENT);//定义显示组件参数
36         FrameLayout.LayoutParams t2params=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
37                 ViewGroup.LayoutParams.WRAP_CONTENT);//定义显示组件参数
38         TextView text1 = new TextView(this);
39         text1.setTextSize(TypedValue.COMPLEX_UNIT_PX,40);
40         text1.setTextColor(Color.rgb(1,1,1));
41         text1.setText("text1");
42         text2 = new TextView(this);
43         text2.setText("text2");
44         text2.setTextSize(TypedValue.COMPLEX_UNIT_PX,24);
45         text2.setTextColor(Color.rgb(1,1,1));
46         text2.setOnClickListener(new View.OnClickListener() {
47             @Override
48             public void onClick(View v) {
49                 new AlertDialog.Builder(MainActivity.this).setTitle("系统提示")
50                         .setMessage("游戏有风险，进入需谨慎，真的要进入吗？")
51                         .setPositiveButton("确定",
52                                 new DialogInterface.OnClickListener() {
53 
54                                     @Override
55                                     public void onClick(DialogInterface dialog, int which) {
56                                         Log.i("3.2", "进入游戏");
57                                     }
58                                 }).setNegativeButton("退出",
59                         new DialogInterface.OnClickListener(){
60 
61                             @Override
62                             public void onClick(DialogInterface dialog,int which) {
63                                 Log.i("3.2","退出游戏");
64                                 finish();
65                             }
66                         }).show();
67             }
68         });
69         text1.setGravity(Gravity.LEFT);
70         frameLayout.addView(text1,t1params);
71 //        t2params.gravity=Gravity.CENTER;
72         text2.setGravity(Gravity.RIGHT);
73         frameLayout.addView(text2,t1params);
74         setContentView(frameLayout,params);
75 
76 /*        super.onCreate(savedInstanceState);
77         FrameLayout layout= new FrameLayout(this);//定义框架布局器
78         FrameLayout.LayoutParams params=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
79                 ViewGroup.LayoutParams.MATCH_PARENT);//定义框架布局器参数
80         FrameLayout.LayoutParams tparams=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
81                 ViewGroup.LayoutParams.WRAP_CONTENT);//定义显示组件参数
82         TextView txtview = new TextView(this);//定义组件
83         txtview.setText("欢迎使用框架布局");
84         EditText et = new EditText(this);
85         et.setText("请选择你喜欢的布局");
86         Button but=new Button(this);
87         but.setText("按我");
88         layout.addView(txtview, tparams);//添加组件
89         layout.addView(et, tparams);
90         layout.addView(but, tparams);
91 
92 
93         setContentView(layout,params);//向屏幕上添加布局显示器
94 */    }
95 }

MainActivity.java

FrameLayout.LayoutParams t2params=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
        ViewGroup.LayoutParams.WRAP_CONTENT);//定义显示组件参数
设置gravity

t2params.gravity=Gravity.CENTER;//有效

text2.setGravity(Gravity.RIGHT);//无效

显示控件：

frameLayout.addView(text1,t1params);
frameLayout.addView(text2,t1params);
setContentView(frameLayout,params);//先addView再显示

　显示layout下的activity_main.xml

setContentView(R.layout.activity_main);

用layout下的View资源

FrameLayout frame = (FrameLayout) findViewById(R.id.mylayout);