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);  }}