Activity多功能按钮——基础编
packagecom.smart; importandroid.app.Activity; importandroid.app.AlertDialog; importandroid.app.Dialog; importandroid.content.DialogInterface; importandroid.os.Bundle; importandroid.util.Log; importandroid.view.View; importandroid.view.View.OnClickListener; importandroid.widget.Button; importandroid.widget.ListView; //继承OnClickListener publicclassMainextendsActivityimplementsOnClickListener{ //固定的静态变量， privatefinalintDELETE_FILE=1; privatefinalintSIMPLE_LIST=2; privatefinalintSINGLE_CHOICE_LIST=3; privatefinalintMULTI_LIST=4; privateListViewlv=null; //定义一个字符串数组 privateString[]provinces=newString[]{"中国","泰国","美国","法国", "新加坡","英国"}; //按钮 privateButtonOnClickbuttonOnClick=newButtonOnClick(1); @Override//事件点击 publicvoidonClick(Viewv){ //开关选择 switch(v.getId()){ caseR.id.btnDeleteFile: showDialog(DELETE_FILE); break; caseR.id.btnSimpleList: showDialog(SIMPLE_LIST); break; caseR.id.btnChoiceList: showDialog(SINGLE_CHOICE_LIST); break; caseR.id.btnMultiChoiceList: showDialog(MULTI_LIST); break; caseR.id.btnRemoveDialog: removeDialog(DELETE_FILE); removeDialog(SIMPLE_LIST); removeDialog(SINGLE_CHOICE_LIST); removeDialog(MULTI_LIST); break; } } @Override protectedDialogonCreateDialog(intid){ 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){ caseDELETE_FILE: returnnewAlertDialog.Builder(this).setIcon(R.drawable.question).setTitle("是否删除文件").setPositiveButton("确定",newDialogInterface.OnClickListener(){ @Override publicvoidonClick(DialogInterfacedialog,intwhich){ newAlertDialog.Builder(Main.this).setMessage("文件已经被删除").create().show(); } }).setNegativeButton("取消",newDialogInterface.OnClickListener(){ @Override publicvoidonClick(DialogInterfacedialog,intwhich){ newAlertDialog.Builder(Main.this).setMessage("您已经选择了取消，文件未删除").create().show(); } }).create(); caseSIMPLE_LIST: returnnewAlertDialog.Builder(this).setTitle("选择国家").setItems(provinces,newDialogInterface.OnClickListener(){ @Override publicvoidonClick(DialogInterfacedialog,intwhich){ finalAlertDialogad=newAlertDialog.Builder(Main.this).setMessage("您已经选择了"+which+":"+provinces[which]).show(); android.os.Handlerhander=newandroid.os.Handler(); hander.postDelayed(newRunnable(){ //线程管理 @Override publicvoidrun(){ ad.dismiss(); } },5*1000); } }).create(); caseSINGLE_CHOICE_LIST: returnnewAlertDialog.Builder(this).setTitle("选择国家").setSingleChoiceItems(provinces,1,buttonOnClick).setPositiveButton("确定",buttonOnClick).setNegativeButton("取消",buttonOnClick).create(); caseMULTI_LIST: AlertDialogad=newAlertDialog.Builder(this).setIcon(R.drawable.image).setTitle("选择国家").setMultiChoiceItems(provinces,newboolean[]{false,true,false,true,false,false},newDialogInterface.OnMultiChoiceClickListener(){ @Override publicvoidonClick(DialogInterfacedialog,intwhich,booleanisChecked){ } }).setPositiveButton("确定",newDialogInterface.OnClickListener(){ @Override publicvoidonClick(DialogInterfacedialog,intwhich){ intcount=lv.getCount(); Strings="您选择了："; for(inti=0;i<provinces.length;i++){ if(lv.getCheckedItemPositions().get(i)){ s+=i+":"+lv.getAdapter().getItem(i)+""; } } if(lv.getCheckedItemPositions().size()>0){ newAlertDialog.Builder(Main.this).setMessage(s).show(); }else{ newAlertDialog.Builder(Main.this).setMessage("您未选择任何国家").show(); } } }).setNegativeButton("取消",null).create(); lv=ad.getListView(); returnad; } returnnull; } @Override publicvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.main); //得到选中的哪一个按钮 ButtonbtnDeletefile=(Button)findViewById(R.id.btnDeleteFile); ButtonbtnSimpleList=(Button)findViewById(R.id.btnChoiceList); ButtonbtnSimngleChoiceList=(Button)findViewById(R.id.btnSimpleList); ButtonbtnMultiChoiceList=(Button)findViewById(R.id.btnMultiChoiceList); ButtonbtnRemoveDialog=(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。 privateclassButtonOnClickimplementsDialogInterface.OnClickListener{ privateintindex; publicButtonOnClick(intindex){ this.index=index; } @Override publicvoidonClick(DialogInterfacedialog,intwhichButton){ if(whichButton>=0){ index=whichButton; }else{ if(whichButton==DialogInterface.BUTTON_POSITIVE){ newAlertDialog.Builder(Main.this).setMessage("您已经选择了:"+index+":"+provinces[index]).show(); }elseif(whichButton==DialogInterface.BUTTON_NEGATIVE){ newAlertDialog.Builder(Main.this).setMessage("你未选择,请选择").show(); } } } } protectedvoidonPrepareDialog(intid,Dialogdialog){ 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
