Activity多功能按钮——基础编

 
 


  
  
package com.smart; 

  
  
 

  
  
import android.app.Activity; 

  
  
import android.app.AlertDialog; 

  
  
import android.app.Dialog; 

  
  
import android.content.DialogInterface; 

  
  
import android.os.Bundle; 

  
  
import android.util.Log; 

  
  
import android.view.View; 

  
  
import android.view.View.OnClickListener; 

  
  
import android.widget.Button; 

  
  
import android.widget.ListView; 

  
  
//继承OnClickListener 

  
  
public class Main extends Activity implements OnClickListener { 

  
  
//固定的静态变量， 

  
  
    private final int DELETE_FILE = 1; 

  
  
    private final int SIMPLE_LIST = 2; 

  
  
    private final int SINGLE_CHOICE_LIST = 3; 

  
  
    private final int MULTI_LIST = 4; 

  
  
    private ListView lv = null; 

  
  
    //定义一个字符串数组 

  
  
    private String[] provinces = new String[] { "中国", "泰国", "美国", "法国", 

  
  
            "新加坡", "英国" }; 

  
  
    //按钮 

  
  
    private ButtonOnClick buttonOnClick = new ButtonOnClick(1); 

  
  
    @Override//事件点击 

  
  
    public void onClick(View v) { 

  
  
 

  
  
        //开关选择 

  
  
        switch(v.getId()){ 

  
  
        case R.id.btnDeleteFile: 

  
  
            showDialog(DELETE_FILE); 

  
  
            break; 

  
  
        case R.id.btnSimpleList: 

  
  
            showDialog(SIMPLE_LIST); 

  
  
            break; 

  
  
        case R.id.btnChoiceList: 

  
  
            showDialog(SINGLE_CHOICE_LIST); 

  
  
            break; 

  
  
        case R.id.btnMultiChoiceList: 

  
  
            showDialog(MULTI_LIST); 

  
  
            break; 

  
  
        case R.id.btnRemoveDialog: 

  
  
            removeDialog(DELETE_FILE); 

  
  
            removeDialog(SIMPLE_LIST); 

  
  
            removeDialog(SINGLE_CHOICE_LIST); 

  
  
            removeDialog(MULTI_LIST); 

  
  
            break; 

  
  
             

  
  
        } 

  
  
    } 

  
  
    @Override 

  
  
    protected Dialog onCreateDialog(int id) { 

  
  
        Log.d("dialog",String.valueOf(id)); 

  
  
        //用来判断选择的目标。如果没有选择，并提示出来，选择中了，也显示结果。详看代码 

  
  
        switch(id){ 

  
  
        case DELETE_FILE: 

  
  
            return new AlertDialog.Builder(this).setIcon(R.drawable.question).setTitle("是否删除文件").setPositiveButton("确定", new DialogInterface.OnClickListener() { 

  
  
                 

  
  
                @Override 

  
  
                public void onClick(DialogInterface dialog, int which) { 

  
  
                    new AlertDialog.Builder(Main.this).setMessage("文件已经被删除").create().show(); 

  
  
                } 

  
  
            }).setNegativeButton("取消", new DialogInterface.OnClickListener() { 

  
  
                 

  
  
                @Override 

  
  
                public void onClick(DialogInterface dialog, int which) { 

  
  
                    new AlertDialog.Builder(Main.this).setMessage("您已经选择了取消，文件未删除").create().show(); 

  
  
                } 

  
  
            }).create(); 

  
  
             

  
  
             

  
  
        case SIMPLE_LIST: 

  
  
        return new AlertDialog.Builder(this).setTitle("选择国家").setItems(provinces, new DialogInterface.OnClickListener() { 

  
  
             

  
  
            @Override 

  
  
            public void onClick(DialogInterface dialog, int which) { 

  
  
                final AlertDialog ad=new AlertDialog.Builder(Main.this).setMessage("您已经选择了"+which+":"+provinces[which]).show(); 

  
  
             

  
  
            android.os.Handler hander=new android.os.Handler(); 

  
  
            hander.postDelayed(new Runnable() { 

  
  
                //线程管理 

  
  
                @Override 

  
  
                public void run() { 

  
  
                    ad.dismiss(); 

  
  
                } 

  
  
            },  5*1000); 

  
  
            } 

  
  
        }).create(); 

  
  
        case SINGLE_CHOICE_LIST: 

  
  
            return new AlertDialog.Builder(this).setTitle("选择国家").setSingleChoiceItems(provinces, 1, buttonOnClick).setPositiveButton("确定", buttonOnClick).setNegativeButton("取消", buttonOnClick).create(); 

  
  
         

  
  
        case    MULTI_LIST: 

  
  
            AlertDialog ad=new AlertDialog.Builder(this).setIcon(R.drawable.image).setTitle("选择国家").setMultiChoiceItems(provinces, new boolean[]{false,true,false,true,false,false} , new DialogInterface.OnMultiChoiceClickListener() { 

  
  
                 

  
  
                @Override 

  
  
                public void onClick(DialogInterface dialog, int which, boolean isChecked) { 

  
  
                     

  
  
                } 

  
  
            }).setPositiveButton("确定", new DialogInterface.OnClickListener() { 

  
  
                 

  
  
                @Override 

  
  
                public void onClick(DialogInterface dialog, int which) { 

  
  
                    int count=lv.getCount(); 

  
  
                    String s="您选择了："; 

  
  
                    for (int i = 0; i < provinces.length; i++) { 

  
  
                        if(lv.getCheckedItemPositions().get(i)){ 

  
  
                            s+=i+":"+lv.getAdapter().getItem(i)+"  "; 

  
  
                        } 

  
  
                    } 

  
  
                    if(lv.getCheckedItemPositions().size()>0){ 

  
  
                        new AlertDialog.Builder(Main.this).setMessage(s).show(); 

  
  
                    }else{ 

  
  
                        new AlertDialog.Builder(Main.this).setMessage("您未选择任何国家").show(); 

  
  
                    } 

  
  
                } 

  
  
            }).setNegativeButton("取消", null).create(); 

  
  
            lv=ad.getListView(); 

  
  
            return ad; 

  
  
        } 

  
  
         

  
  
             

  
  
         

  
  
         

  
  
         

  
  
         

  
  
        return null; 

  
  
    } 

  
  
 

  
  
     

  
  
    @Override 

  
  
    public void onCreate(Bundle savedInstanceState) { 

  
  
        super.onCreate(savedInstanceState); 

  
  
        setContentView(R.layout.main); 

  
  
        //得到选中的哪一个按钮 

  
  
        Button btnDeletefile=(Button)findViewById(R.id.btnDeleteFile); 

  
  
        Button btnSimpleList=(Button)findViewById(R.id.btnChoiceList); 

  
  
        Button btnSimngleChoiceList=(Button)findViewById(R.id.btnSimpleList); 

  
  
        Button btnMultiChoiceList=(Button)findViewById(R.id.btnMultiChoiceList); 

  
  
        Button btnRemoveDialog=(Button)findViewById(R.id.btnRemoveDialog); 

  
  
 

  
  
        //绑定监听器 

  
  
        btnDeletefile.setOnClickListener(this); 

  
  
        btnSimpleList.setOnClickListener(this); 

  
  
        btnSimngleChoiceList.setOnClickListener(this); 

  
  
        btnMultiChoiceList.setOnClickListener(this); 

  
  
        btnRemoveDialog.setOnClickListener(this); 

  
  
         

  
  
    } 

  
  
    //定义一个类，用来判断选择中的。 

  
  
    private class ButtonOnClick implements DialogInterface.OnClickListener { 

  
  
        private int index; 

  
  
 

  
  
        public ButtonOnClick(int index) { 

  
  
            this.index = index; 

  
  
        } 

  
  
 

  
  
        @Override 

  
  
        public void onClick(DialogInterface dialog, int whichButton) { 

  
  
                if(whichButton>=0){ 

  
  
                    index=whichButton; 

  
  
                }else{ 

  
  
                    if(whichButton==DialogInterface.BUTTON_POSITIVE){ 

  
  
                        new AlertDialog.Builder(Main.this).setMessage("您已经选择了:"+index+":"+provinces[index]).show(); 

  
  
                         

  
  
                    }else if(whichButton==DialogInterface.BUTTON_NEGATIVE){ 

  
  
                        new AlertDialog.Builder(Main.this).setMessage("你未选择,请选择").show(); 

  
  
                         

  
  
                    } 

  
  
                } 

  
  
             

  
  
             

  
  
        } 

  
  
 

  
  
    } 

  
  
protected void onPrepareDialog(int id,Dialog dialog){ 

  
  
    super.onPrepareDialog(id, dialog); 

  
  
} 

  
  
 

  
  
 

  
  
 

  
  
 

  
  
 

  
  
 

  
  
 

  
  
     

  
  
} 
 
 

另外很多朋友对Android系统构架图还不是很了解，我附上一张中文的图给大家观看

本文转自 llb988 51CTO博客，原文链接：http://blog.51cto.com/llb988/489522，如需转载请自行联系原作者