系统定义弹窗以及自定义弹窗

知识点：

1 系统定义弹窗

2 自定义弹窗

1 系统定义弹窗

android 中系统弹窗可以方便的进行弹窗提醒功能：

使用AlertDialog.Builder Dialog = new AlertDialog.Builder(this);

设置相关属性之后，show()出Dialog即可。

代码：

/** * 展示更新对话框 */protected void ShowDialog() {AlertDialog.Builder Dialog = new AlertDialog.Builder(this);Dialog.setTitle("检查更新");Dialog.setMessage(mDescription);Dialog.setPositiveButton("立即更新", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {DownLoadAPK();}});Dialog.setNegativeButton("以后再说", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubEnterHomeActivity();}});Dialog.setOnCancelListener(new OnCancelListener() {@Overridepublic void onCancel(DialogInterface dialog) {EnterHomeActivity();}});Dialog.show();}

2 自定义弹窗：

1 需要编写弹窗xml文件

2 将弹窗xml文件放入到dialog中

          

step 1：弹窗的xml文件：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="#fff"    android:orientation="vertical" >    <TextView        android:id="@+id/tv_dialog_set_passwrod_titile"        android:layout_width="match_parent"        android:layout_height="30sp"        android:background="@android:color/holo_orange_light"        android:gravity="center"        android:textSize="22sp"        android:text="手机防盗" />    <EditText        android:id="@+id/et_dialog_set_passwrod_password"        android:layout_width="match_parent"        android:layout_height="wrap_content"                android:hint="请输入密码"        android:singleLine="true"         >    </EditText>    <EditText        android:id="@+id/et_dialog_set_passwrod_comformpassword"        android:layout_width="match_parent"        android:layout_height="wrap_content"               android:hint="请输入确认密码"        android:singleLine="true"         />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <Button            android:id="@+id/button_dialog_set_passwrod_OK"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="确认" />        <Button            android:id="@+id/button_dialog_set_passwrod_cancel"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="取消" />    </LinearLayout></LinearLayout>

step2 ：将弹窗布局xml文件放入到弹窗中

1 获得dialog,注意在create的时候，进行了类型转换

AlertDialog.Builder builder = new AlertDialog.Builder(HomeActivity.this);final AlertDialog dialog = builder.create();

2 将布局放入

View view=View.inflate(HomeActivity.this, R.layout.dialog_set_password, null);dialog.setView(view, 0, 0, 0, 0);

setview(view,0,0,0,0)是为了兼容低版本的androd系统

完整代码：

protected void ShowInputPasswordDialog() {AlertDialog.Builder builder = new AlertDialog.Builder(HomeActivity.this);final AlertDialog dialog = builder.create();View view=View.inflate(HomeActivity.this, R.layout.dialog_set_password, null);final EditText ed_password = (EditText)view.findViewById(R.id.et_dialog_set_passwrod_password);final EditText ed_comformpassword = (EditText)view.findViewById(R.id.et_dialog_set_passwrod_comformpassword);Button Btn_ok = (Button)view.findViewById(R.id.button_dialog_set_passwrod_OK);Button Btn_cancel=(Button)view.findViewById(R.id.button_dialog_set_passwrod_cancel);dialog.setView(view, 0, 0, 0, 0);sharedPreferences = getSharedPreferences("config", MODE_PRIVATE);Btn_ok.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//获取要放到点击事件内部，在外部会丢掉数据password =ed_password.getText().toString();comformpassword=ed_comformpassword.getText().toString();if(!TextUtils.isEmpty(password)){System.out.println("password : "+password+" comformpassword :" +comformpassword);if(password.equals(comformpassword)){sharedPreferences.edit().putString("password", password).commit();Toast.makeText(HomeActivity.this, "登陆成功", Toast.LENGTH_SHORT).show();dialog.dismiss();}else{Toast.makeText(HomeActivity.this, "登陆失败,请输入两个相同的密码", Toast.LENGTH_SHORT).show();}}}});Btn_cancel.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {dialog.dismiss();}});dialog.show();   }