Android中經常會需要在Android界面上彈出一些對話框提示用戶，比如App的退出的時候都會有各種框來挽留你的心，支付寶的時候輸入密碼的密碼框，非常常見及其實用的功能，類似於JS中的alter，C#中C/S中常用MessgeBox，總而言之就是一個功能彈，彈，彈，本文就簡單的敘述一下Dialog的各種彈框使用及監聽，順便寫了一個簡單的自定義彈框，接下來請看正文:
一般對話框
先看下整個App頁面:
看下一般對話框的結果:
具體代碼的實現，其中定義了兩個按鈕，一個是確定（PositiveButton）按鈕，一個是取消（NegativeButton）按鈕:
builder = new AlertDialog.Builder(this);
builder.setTitle("親,你真的要離開嗎?");
// 相當於確定
builder.setPositiveButton("退出",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, "是的，哥要走了",
Toast.LENGTH_SHORT).show();
}
});
// 相當於取消
builder.setNegativeButton("再看看",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, "行，哥再看會",
Toast.LENGTH_SHORT).show();
}
});
builder.show();
ICON對話框
上面只是用到了兩個按鈕，其實還有一個是中立按鈕，另外發現每次都寫一個監聽事件感覺太麻煩了，可以單獨寫一個監聽事件去判斷哪個事件被觸發了:
單獨定義個DialogClickListener:
private DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
Toast.makeText(MainActivity.this, "強烈支持" + which,
Toast.LENGTH_SHORT).show();
break;
case DialogInterface.BUTTON_NEUTRAL:
Toast.makeText(MainActivity.this, "跟我無關，我是中立的" + which,
Toast.LENGTH_SHORT).show();
break;
case DialogInterface.BUTTON_NEGATIVE:
Toast.makeText(MainActivity.this, "強烈反對" + which,
Toast.LENGTH_SHORT).show();
break;
default:
break;
}
}
};
按鈕事件的調用:
builder = new AlertDialog.Builder(this);
builder.setTitle("XX視頻");
builder.setIcon(android.R.drawable.btn_star);
builder.setMessage("如何看待香港占中事件?");
builder.setPositiveButton("支持", dialogClickListener);
builder.setNegativeButton("反對", dialogClickListener);
// 中立
builder.setNeutralButton("中立", dialogClickListener);
builder.show();
列表對話框
看下效果圖:
代碼實現:
builder = new AlertDialog.Builder(this);
builder.setTitle("NBA幻覺");
builder.setIcon(android.R.drawable.btn_star);
final String[] nameArrStrings = new String[] { "馬刺很老", "小牛很弱",
"火箭很強" };
builder.setItems(nameArrStrings, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, nameArrStrings[which],
Toast.LENGTH_SHORT).show();
}
});
builder.setPositiveButton("確定", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
builder.setNegativeButton("取消", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
builder.show();
單選對話框
效果圖：
代碼實現:
builder = new AlertDialog.Builder(this);
builder.setTitle("NBA球隊");
builder.setIcon(android.R.drawable.btn_radio);
final String[] ballArr = new String[] { "騎士", "熱火", "凱爾特人" };
builder.setSingleChoiceItems(ballArr, 1, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, ballArr[which],
Toast.LENGTH_SHORT).show();
}
});
builder.setPositiveButton("確定", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
builder.setNegativeButton("取消", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
builder.show();
多選對話框
效果圖:
代碼實現:
builder = new AlertDialog.Builder(this);
builder.setTitle("NBA球星");
builder.setIcon(android.R.drawable.btn_radio);
final String[] ballstartArr = new String[] { "鄧肯", "諾維斯基", "萊昂納德",
"科比" };
final boolean[] multiCheckedArrStrings = new boolean[] { true,
false, true, false };
builder.setMultiChoiceItems(ballstartArr, multiCheckedArrStrings,
new OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int which,
boolean isChecked) {
// TODO Auto-generated method stub
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < multiCheckedArrStrings.length; i++) {
if (multiCheckedArrStrings[i]) {
buffer.append(ballstartArr[i] + ",");
}
}
buffer.deleteCharAt(buffer.length() - 1);
Toast.makeText(MainActivity.this, buffer,
Toast.LENGTH_SHORT).show();
}
});
builder.setPositiveButton("確定", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
builder.show();
文本對話框
比如說支付寶，轉賬的時候你需要輸入密碼，彈出一個密碼輸入框，效果如圖:
代碼實現,，這個時候你需要給builder中的view賦值:
builder = new AlertDialog.Builder(this);
builder.setTitle("輸入密碼");
builder.setIcon(android.R.drawable.btn_star);
final EditText editText = new EditText(MainActivity.this);
builder.setView(editText);
builder.setPositiveButton("確定",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this,
"輸入的密碼是：" + editText.getText(),
Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, "取消",
Toast.LENGTH_SHORT).show();
}
});
builder.show();
自定義對話框
上面的那個EditText是創建的，其實可以自定義一個布局，然后通過填充進去,效果如下:
自定義一個dialog_text.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:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="密碼:" />
<EditText
android:id="@+id/edit_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
代碼實現:
builder = new AlertDialog.Builder(this);
builder.setTitle("輸入密碼");
builder.setIcon(android.R.drawable.btn_star);
final EditText editText = new EditText(MainActivity.this);
builder.setView(editText);
builder.setPositiveButton("確定",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this,
"輸入的密碼是：" + editText.getText(),
Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, "取消",
Toast.LENGTH_SHORT).show();
}
});
builder.show();
------------2015.11.15更新---忘記寫了，還有一種是進度條對話框，簡單的進度對話框和帶進度的對話框-----
代碼如下:
ProgressDialog progressDialog=new ProgressDialog(this);
progressDialog.setTitle("XX助手");
progressDialog.setMessage("XX正在更新。。。");
progressDialog.show();
顯示進度的對話框:
代碼如下:
final ProgressDialog precentDialog=new ProgressDialog(this);
precentDialog.setTitle("XX下載");
precentDialog.setMessage("XX正在更新。。。");
precentDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
precentDialog.setMax(100);
precentDialog.show();
new Thread(){
public void run() {
for (int i = 0; i < 100; i++) {
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
precentDialog.setProgress(i);
}
precentDialog.dismiss();
};
}.start();