//創建DialogAlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);//設置標題圖標builder.setIcon(R.drawable.ic_launcher);//設置標題builder.setTitle("這是一個對話框");//設置信息builder.setMessage("是否要跳轉？");//確定按鈕setPositiveButton(CharSequence text, DialogInterface.OnClickListener listener)//取消按鈕setNegativeButton (CharSequence text, DialogInterface.OnClickListener listener)//忽略setNeutralButton (CharSequence text, DialogInterface.OnClickListener listener)//顯示對話框show();

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);     builder.setIcon(R.drawable.ic_launcher);     builder.setTitle("選擇一個城市");     //下拉列表的數據源     final String[] cities = {"北京", "上海", "廣州", "深圳", "杭州"};     builder.setItems(cities, new DialogInterface.OnClickListener(){       @Override       public void onClick(DialogInterface dialog, int which){         Toast.makeText(MainActivity.this, "你選擇的城市為：" + cities[which], Toast.LENGTH_SHORT).show();       } }); builder.show();

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);    builder.setIcon(R.drawable.ic_launcher);    builder.setTitle("請選擇性別");    final String[] sex = {"男", "女"};    //第二個參數指定默認哪個單選框被勾中    builder.setSingleChoiceItems(sex, 1, new DialogInterface.OnClickListener(){      @Override      public void onClick(DialogInterface dialog, int which){          Toast.makeText(MainActivity.this, "性別為：" + sex[which], Toast.LENGTH_SHORT).show();      }    });    builder.setPositiveButton("確定", new DialogInterface.OnClickListener(){      @Override      public void onClick(DialogInterface dialog, int which){                  }    });    builder.setNegativeButton("取消", new DialogInterface.OnClickListener(){      @Override      public void onClick(DialogInterface dialog, int which){                  }    });builder.show();

String str;AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);builder.setIcon(R.drawable.ic_launcher);builder.setTitle("選擇你想看的電視劇");final String[] hobbies = {"廷禧攻略", "扶搖", "香蜜沉沉燼如霜", "如懿傳"};//第二個參數代表哪幾個選項被選擇，需要傳遞一個boolean[]數組進去，其長度要和第一個參數的長度相同,如果null表示都不選builder.setMultiChoiceItems(hobbies, null, new DialogInterface.OnMultiChoiceClickListener(){　 @Override　　public void onClick(DialogInterface dialog, int which, boolean isChecked){  　　if(isChecked){  　　　　str.append(hobbies[which] + ", ");  　　}  　　Toast.makeText(MainActivity.this, "選擇的是：" + str.toString(), Toast.LENGTH_SHORT).show();  } });builder.setPositiveButton("確定", new DialogInterface.OnClickListener(){　　@Override　　public void onClick(DialogInterface dialog, int which){  }});builder.setNegativeButton("取消", new DialogInterface.OnClickListener(){　　@Override　　public void onClick(DialogInterface dialog, int which){  }});builder.show();

ProgressDialog waitingDialog= new ProgressDialog(MainActivity.this);waitingDialog.setTitle("等待加載中，請稍后...");waitingDialog.setMessage("等待中...");waitingDialog.setIndeterminate(true);//采用不確定式的進度條waitingDialog.setCancelable(false);//點擊外部不取消對話框waitingDialog.show();

int MAXPD = 100;ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);progressDialog.setProgress(0);//設置默認值progressDialog.setTitle("正在下載");progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);//進度條樣式progressDialog.setMax(MAXPD);//設置最大值progressDialog.show();

public class CustomDialog extends Dialog {//標題protected TextView hintTv;//左邊按鈕protected Button doubleLeftBtn;//右邊按鈕protected Button doubleRightBtn;//輸入框public EditText editText;public CustomDialog(Context context) {  super(context, R.style.CustomDialogStyle);}@Overrideprotected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  this.setCancelable(false); // 是否可以撤銷  setContentView(R.layout.dialog_custom);  hintTv = findViewById(R.id.tv_common_dialog_hint);  doubleLeftBtn = findViewById(R.id.btn_common_dialog_double_left);  doubleRightBtn = findViewById(R.id.btn_common_dialog_double_right);  editText = findViewById(R.id.et_common_dialog);}//置右鍵文字和點擊事件public void setRightButton(String rightStr, View.OnClickListener clickListener) {  doubleRightBtn.setOnClickListener(clickListener);  doubleRightBtn.setText(rightStr);}//設置左鍵文字和點擊事件public void setLeftButton(String leftStr, View.OnClickListener clickListener) {  doubleLeftBtn.setOnClickListener(clickListener);  doubleLeftBtn.setText(leftStr);}//設置提示內容public void setHintText(String str) {  hintTv.setText(str);  hintTv.setVisibility(View.VISIBLE);}//給兩個按鈕 設置文字public void setBtnText(String leftStr, String rightStr) {  doubleLeftBtn.setText(leftStr);  doubleRightBtn.setText(rightStr);}}

<style name="CustomDialogStyle" parent="@android:style/Theme.Dialog">    <!-- 邊框 -->    <item name="android:windowFrame">@null</item>    <!-- 背景透明 -->    <item name="android:windowBackground">@color/transparent</item>    <!-- 無標題 -->    <item name="android:windowNoTitle">true</item>    <!-- 是否浮現在activity之上 -->    <item name="android:windowIsFloating">true</item>    <!-- 半透明 -->    <item name="android:windowIsTranslucent">false</item>    <!-- 背景模糊 -->    <item name="android:windowContentOverlay">@null</item>    <!-- 允許對話框的背景變暗 -->    <item name="android:backgroundDimEnabled">true</item>    <!-- 字體顏色 -->    <item name="android:textColor">@color/white</item>    <item name="android:editTextColor">@color/white</item> </style>

<LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:id="@+id/ll_common_dialog_layout"  android:layout_width="500dp"  android:layout_height="250dp"  android:layout_margin="5dp"  android:background="@drawable/background_info"  android:orientation="vertical"  android:gravity="center">  <!--提示信息-->  <TextView    android:id="@+id/tv_common_dialog_hint"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:gravity="center"    android:textColor="@color/white"    android:textSize="27sp"/>  <EditText    android:id="@+id/et_common_dialog"    android:layout_width="300dp"    android:layout_height="wrap_content"    android:textColor="@color/back"    android:inputType="text|textNoSuggestions"    tools:ignore="LabelFor"    android:hint="請輸入密碼"/>    <!--底部按鈕-->  <LinearLayout    android:id="@+id/ll_common_dialog_double"    android:layout_width="360dp"    android:layout_height="60dp"    android:layout_margin="20dp"    android:orientation="horizontal">    <Button      android:id="@+id/btn_common_dialog_double_left"      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:background="@drawable/btnselector"      android:gravity="center"      android:textColor="@color/white"      android:textSize="27dp"/>    <Button      android:id="@+id/btn_common_dialog_double_right"      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:background="@drawable/btnselector"      android:gravity="center"      android:textColor="@color/white"      android:textSize="27dp"/>  </LinearLayout></LinearLayout>

//彈出dialog時隱藏底部虛擬按鍵dialog.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);dialog.getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {  @Override  public void onSystemUiVisibilityChange(int visibility) {    int uiOptions =View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;    if (Build.VERSION.SDK_INT >= 19) {      uiOptions |= 0x00001000;    } else {      uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;    }    dialog.getWindow().getDecorView().setSystemUiVisibility(uiOptions);  }});

CustomDialog dialog = new CustomDialog(this);dialog.setHintText("請輸入密碼");dialog.setLeftButton("取消", new View.OnClickListener() {    @Override    public void onClick(View v) {      dialog.dismiss();    }});dialog.setRightButton("確定", new View.OnClickListener() {    @Override    public void onClick(View v) {            }});dialog.show();