编写警告对话框+硬编码生成界面+国际化+自适应屏幕分辩率+样式与主题

   1:  package com.example.notification;

   2:   

   3:  import android.net.Uri;

   4:  import android.os.Bundle;

   5:  import android.app.Activity;

   6:  import android.app.AlertDialog;

   7:  import android.app.Notification;

   8:  import android.app.NotificationManager;

   9:  import android.app.PendingIntent;

  10:  import android.content.Context;

  11:  import android.content.DialogInterface;

  12:  import android.content.Intent;

  13:  import android.view.Menu;

  14:  import android.view.View;

  15:  import android.widget.Button;

  16:   

  17:  public class MainActivity extends Activity {

  18:   

  19:      @Override

  20:      protected void onCreate(Bundle savedInstanceState) {

  21:          super.onCreate(savedInstanceState);

  22:          setContentView(R.layout.activity_main);

  23:          Button button = (Button)findViewById(R.id.button);

  24:          

  25:          button.setOnClickListener(new View.OnClickListener() {

  26:              

  27:              @Override

  28:              public void onClick(View v) {

  29:                  // TODO Auto-generated method stub

  30:                  new AlertDialog.Builder(MainActivity.this)

  31:                  .setTitle("sharpandroid")

  32:                  .setMessage("你确定要访问 Android 网站吗？")

  33:                  .setCancelable(false)

  34:                  .setPositiveButton("确定", new DialogInterface.OnClickListener() {

  35:                  public void onClick(DialogInterface dialog, int id) {

  36:                  //创建一个访问“http://www.android.com”网站的意图，

  37:                  //该意图会告知系统打开浏览器，并访问该网址。

  38:                  Intent intent = new Intent(Intent.ACTION_VIEW,

  39:                  Uri.parse("http://www.android.com"));

  40:                  startActivity(intent);

  41:                  }

  42:                  })

  43:                  .setNegativeButton("取消", new DialogInterface.OnClickListener() {

  44:                  public void onClick(DialogInterface dialog, int id) {

  45:                  dialog.cancel(); //删除对话框

  46:                  }

  47:                  }).show();//显示对话框

  48:                 

  49:              }

  50:          });

  51:      }

  52:   

  53:      @Override

  54:      public boolean onCreateOptionsMenu(Menu menu) {

  55:          // Inflate the menu; this adds items to the action bar if it is present.

  56:          getMenuInflater().inflate(R.menu.main, menu);

  57:          return true;

  58:      }

  59:   

  60:  }

   1:  package com.example.dynamiclayout;

   2:   

   3:  import android.os.Bundle;

   4:  import android.app.Activity;

   5:  import android.view.Menu;

   6:  import android.view.ViewGroup;

   7:  import android.widget.LinearLayout;

   8:  import android.widget.TextView;

   9:   

  10:  public class MainActivity extends Activity {

  11:   

  12:      @Override

  13:      protected void onCreate(Bundle savedInstanceState) {

  14:          super.onCreate(savedInstanceState);

  15:          //setContentView(R.layout.activity_main);

  16:          //创建一个线性布局文件

  17:          LinearLayout layout = new LinearLayout(this);

  18:          //创建一个布局参数，确定该线性布局的宽和高。

  19:          LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);

  20:          //把该组件显示在屏幕上

  21:          setContentView(layout,layoutParams);

  22:          //创建一个 TextView

  23:          TextView textView = new  TextView(this);

  24:          //设置 textView 上显示的文字信息

  25:          textView.setText("我来自JAVA，而不是xml文件！");

  26:          //创建一个布局参数，确定该线性布局的宽和高。

  27:          LinearLayout.LayoutParams tLayoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);

  28:          //将 textView 添加入布局文件中,并在屏幕中显示

  29:          layout.addView(textView,tLayoutParams);

  30:      }

  31:   

  32:      @Override

  33:      public boolean onCreateOptionsMenu(Menu menu) {

  34:          // Inflate the menu; this adds items to the action bar if it is present.

  35:          getMenuInflater().inflate(R.menu.main, menu);

  36:          return true;

  37:      }

  38:   

  39:  }

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <!--
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
    -->
    <style name="AppBaseTheme" parent="android:Theme.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>

    <style name="sharp"><!-- 为样式定义一个全局的唯一的名字 -->
        <item name = "android:textSize">18px</item><!--name 属性为样式要用在的View 控件持有的属性   -->        
    <item name="android:textColor">#0000CC</item>
    </style>
</resources>

在布局文件中的使用方法：

 <TextView

        style="@style/sharp"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="480x320" />

<style name="subsharp" parent="@style/sharp">

<item name="android:textColor">#FF0000</item>

</style>