android > AlertDialog.Builder 弹出窗口

最新推荐文章于 2022-03-09 06:30:00 发布

原创最新推荐文章于 2022-03-09 06:30:00 发布 · 180 阅读

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本文介绍了如何在Android应用中使用AlertDialog.Builder创建不同类型的对话框，包括简单的确认对话框、带文本输入的对话框及单选项对话框。通过具体代码示例展示了对话框的基本用法及其交互方式。

** Service 中弹出

        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setPositiveButton("关闭", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                dialog.dismiss();
            }
        });
        builder.setMessage("发现新版本");
        AlertDialog builder_alert = builder.create();
        builder_alert.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
        builder_alert.show();

* 弹出确认，取消对话框

package broad.com;

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

public class BroadActivity extends Activity {
    /** Called when the activity is first created. */
	private Button button_1;
	Builder builder;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);        
        button_1 = (Button)findViewById(R.id.button1);
        button_1.setOnClickListener(new ClickReceive());        
    }    
    class ClickReceive implements OnClickListener{
    	public void onClick(View v) {
    		// TODO Auto-generated method stub
    		builder = new Builder(BroadActivity.this);
    	      // builder.setIcon(R.drawable.ic_launcher);
    	       builder.setMessage("hello");
    	       builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {   
    	              public void onClick(DialogInterface dialog, int id) {  
    	            	  
    	            	  BroadActivity.this.onCreate(null) ;  //相当于把当前activity 重新刷新
    	              
    	              
    	              }   
    	          });
    	       /*
    	       builder.setTitle("是否删除文件");
    	       builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {   
    	              public void onClick(DialogInterface dialog, int id) {   
    	              BuiderActivity.this.onCreate(null) ;   
    	              }   
    	          });*/
    	       builder.create().show();
    	}
    	////
    }
    
    
}

* 弹出文本输入框，并将输入结果显示在 TextView

package test.mft;

import android.app.Activity;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

public class TestActivity extends Activity {
    /** Called when the activity is first created. */
	private Button b1;
	private TextView v1;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        b1 = (Button)findViewById(R.id.b1);
        v1 = (TextView)findViewById(R.id.v1);
        
        b1.setOnClickListener(new View.OnClickListener() {
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				Builder builder = new Builder(TestActivity.this);
				builder.setTitle("请输入");
				builder.setIcon(android.R.drawable.ic_dialog_info);
				final EditText inputText = new EditText(TestActivity.this);
				builder.setView(inputText);
				builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {     
                    public void onClick(DialogInterface dialog, int id) {  
                    	Appendable value = inputText.getText();
                        v1.setText(value.toString());
                    }     
                });
				builder.setNegativeButton("取消", null);
				builder.show();
			}
		});
        
    }
}

* 弹出单选框

package test.mft;

import android.app.Activity;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

public class TestActivity extends Activity {
    /** Called when the activity is first created. */
	private Button b1;
	private TextView v1;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        b1 = (Button)findViewById(R.id.b1);
        v1 = (TextView)findViewById(R.id.v1);
        
        b1.setOnClickListener(new View.OnClickListener() {
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				Builder builder = new Builder(TestActivity.this);
				builder.setTitle("请选择");
				builder.setIcon(android.R.drawable.ic_dialog_info);
				builder.setSingleChoiceItems(new String[] {"选项1","选项2","选项3","选项4"}, 0,   
						  new DialogInterface.OnClickListener() {                    
				     public void onClick(DialogInterface dialog, int which) {  
				   
				        v1.setText(""+which);
				        dialog.dismiss();  //关闭对话框
				        
				     }  
				  }  
				);  
				builder.show();
			}
		});
        
    }
}