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