Android Dialog 对话框详解及示例代码

<?xml version="1.0" encoding="utf-8"?>
<linearlayout android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">

  <textview android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/TextView01" android:text="对话框示例" android:textsize="20sp" android:layout_margintop="5dp">
  </textview>

  <button android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/Button01" android:text="显示对话框|ShowDialog()" android:textsize="20sp" android:layout_margintop="5dp">
  </button>

  <button android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/Button02" android:text="关闭对话框|dismissDialog()" android:textsize="20sp" android:layout_margintop="5dp">
  </button>

  <button android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/Button03" android:text="移除对话框|removeDialog()" android:textsize="20sp" android:layout_margintop="5dp">
  </button>
</linearlayout>

package android.basic.lesson17;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainHelloAlertDialog extends Activity {

  //定义一个对话框的ID
  int Edward_Movie_Dialog = 1;

  // 对话框按钮点击事件监听器
  OnClickListener ocl = new OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
      switch (which) {
      case Dialog.BUTTON_NEGATIVE:
        Toast.makeText(MainHelloAlertDialog.this, "我不喜欢他的电影。",
            Toast.LENGTH_LONG).show();
        break;
      case Dialog.BUTTON_NEUTRAL:
        Toast.makeText(MainHelloAlertDialog.this, "说不上喜欢不喜欢。",
            Toast.LENGTH_LONG).show();
        break;
      case Dialog.BUTTON_POSITIVE:
        Toast.makeText(MainHelloAlertDialog.this, "我很喜欢他的电影。",
            Toast.LENGTH_LONG).show();
        break;
      }
    }
  };

  @Override
  /** Called when the activity is first created. */
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // 定义对话框对象
    Dialog dialog = new AlertDialog.Builder(this)
    .setIcon(android.R.drawable.btn_star).setTitle("喜好调查")
    .setMessage("你喜欢看爱德华.诺顿Edward Norton的电影吗？")
    .setNegativeButton("不喜欢", ocl).setNeutralButton("一般般", ocl)
    .setPositiveButton("很喜欢", ocl).create();

    //显示对话框
    dialog.show();

    //定义 按钮 UI组件
    Button b1 = (Button) findViewById(R.id.Button01);
    Button b2 = (Button) findViewById(R.id.Button02);
    Button b3 = (Button) findViewById(R.id.Button03);

    //定义按钮的单击事件监听器
    View.OnClickListener b_ocl= new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        switch(v.getId()){
        case R.id.Button01:
          //显示对话框
          showDialog(Edward_Movie_Dialog);
          break;
        case R.id.Button02:
          //关闭对话框 这个功能好傻X，根本点不到的按钮
          dismissDialog(Edward_Movie_Dialog);
          break;
        case R.id.Button03:
          //移除对话框 这个功能好傻X，根本点不到的按钮
          removeDialog(Edward_Movie_Dialog);
          break;
        }
      }
    };

    //绑定按钮监听器
    b1.setOnClickListener(b_ocl);
    b2.setOnClickListener(b_ocl);
    b3.setOnClickListener(b_ocl);

  }

  // 创建会话框时调用
  @Override
  public Dialog onCreateDialog(int id) {
    Toast.makeText(this, "onCreateDialog方法被调用", Toast.LENGTH_LONG).show();

    return new AlertDialog.Builder(this)
    .setIcon(android.R.drawable.btn_star).setTitle("喜好调查")
    .setMessage("你喜欢看爱德华.诺顿Edward Norton的电影吗？")
    .setNegativeButton("不喜欢", ocl).setNeutralButton("一般般", ocl)
    .setPositiveButton("很喜欢", ocl).create();
  }

  // 每次显示对话框之前会被调用
  @Override
  public void onPrepareDialog(int id, Dialog dialog){
    Toast.makeText(this, "onPrepareDialog方法被调用", Toast.LENGTH_LONG).show();
     super.onPrepareDialog(id, dialog);
  }

}