用Dialog实现android 8种对话框
Android提供了丰富的Dialog函数，本文介绍常用的8种对话框的使用方法，包括普通、列表、单选、多选、等待、进度条、编辑、自定义等多种形式。有时，我们希望在对话框创建或关闭时完成一些特定的功能，这需要复写Dialog的create()、show()、dismiss()等方法。
Dialog使用方法
1、普通Dialog
2个按钮
public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button buttonNormal = (Button) findViewById(R.id.button_normal);buttonNormal.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {showNormalDialog();}});}private void showNormalDialog(){/* @setIcon 设置对话框图标* @setTitle 设置对话框标题* @setMessage 设置对话框消息提示* setXXX方法返回Dialog对象，因此可以链式设置属性*/final AlertDialog.Builder normalDialog = new AlertDialog.Builder(MainActivity.this);normalDialog.setIcon(R.drawable.icon_dialog);normalDialog.setTitle("我是一个普通Dialog")normalDialog.setMessage("你要点击哪一个按钮呢?");normalDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//...To-do}});normalDialog.setNegativeButton("关闭", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//...To-do}});// 显示normalDialog.show();}
}
3个按钮
/* @setNeutralButton 设置中间的按钮* 若只需一个按钮，仅设置 setPositiveButton 即可*/
private void showMultiBtnDialog(){AlertDialog.Builder normalDialog = new AlertDialog.Builder(MainActivity.this);normalDialog.setIcon(R.drawable.icon_dialog);normalDialog.setTitle("我是一个普通Dialog").setMessage("你要点击哪一个按钮呢?");normalDialog.setPositiveButton("按钮1", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// ...To-do}});normalDialog.setNeutralButton("按钮2", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// ...To-do}});normalDialog.setNegativeButton("按钮3", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// ...To-do}});// 创建实例并显示normalDialog.show();
}
2、列表Dialog
private void showListDialog() {final String[] items = { "我是1","我是2","我是3","我是4" };AlertDialog.Builder listDialog = new AlertDialog.Builder(MainActivity.this);listDialog.setTitle("我是一个列表Dialog");listDialog.setItems(items, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// which 下标从0开始// ...To-doToast.makeText(MainActivity.this, "你点击了" + items[which], Toast.LENGTH_SHORT).show();}});listDialog.show();
}
3、单选Dialog
int yourChoice;
private void showSingleChoiceDialog(){final String[] items = { "我是1","我是2","我是3","我是4" };yourChoice = -1;AlertDialog.Builder singleChoiceDialog = new AlertDialog.Builder(MainActivity.this);singleChoiceDialog.setTitle("我是一个单选Dialog");// 第二个参数是默认选项，此处设置为0singleChoiceDialog.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {yourChoice = which;}});singleChoiceDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {if (yourChoice != -1) {Toast.makeText(MainActivity.this, "你选择了" + items[yourChoice], Toast.LENGTH_SHORT).show();}}});singleChoiceDialog.show();
}
4、多选Dialog
ArrayList<Integer> yourChoices = new ArrayList<>();
private void showMultiChoiceDialog() {final String[] items = { "我是1","我是2","我是3","我是4" };// 设置默认选中的选项，全为false默认均未选中final boolean initChoiceSets[]={false,false,false,false};yourChoices.clear();AlertDialog.Builder multiChoiceDialog = new AlertDialog.Builder(MainActivity.this);multiChoiceDialog.setTitle("我是一个多选Dialog");multiChoiceDialog.setMultiChoiceItems(items, initChoiceSets,new DialogInterface.OnMultiChoiceClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which,boolean isChecked) {if (isChecked) {yourChoices.add(which);} else {yourChoices.remove(which);}}});multiChoiceDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {int size = yourChoices.size();String str = "";for (int i = 0; i < size; i++) {str += items[yourChoices.get(i)] + " ";}Toast.makeText(MainActivity.this, "你选中了" + str, Toast.LENGTH_SHORT).show();}});multiChoiceDialog.show();
}
5、等待Dialog
private void showWaitingDialog() {/* 等待Dialog具有屏蔽其他控件的交互能力* @setCancelable 为使屏幕不可点击，设置为不可取消(false)* 下载等事件完成后，主动调用函数关闭该Dialog*/ProgressDialog waitingDialog= new ProgressDialog(MainActivity.this);waitingDialog.setTitle("我是一个等待Dialog");waitingDialog.setMessage("等待中...");waitingDialog.setIndeterminate(true);waitingDialog.setCancelable(false);waitingDialog.show();
}
2.6 进度条Dialog（图7）
private void showProgressDialog() {/* @setProgress 设置初始进度* @setProgressStyle 设置样式（水平进度条）* @setMax 设置进度最大值*/final int MAX_PROGRESS = 100;final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);progressDialog.setProgress(0);progressDialog.setTitle("我是一个进度条Dialog");progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);progressDialog.setMax(MAX_PROGRESS);progressDialog.show();/* 模拟进度增加的过程* 新开一个线程，每个100ms，进度增加1*/new Thread(new Runnable() {@Overridepublic void run() {int progress= 0;while (progress < MAX_PROGRESS){try {Thread.sleep(100);progress++;progressDialog.setProgress(progress);} catch (InterruptedException e){e.printStackTrace();}}// 进度达到最大值后，窗口消失progressDialog.cancel();}}).start();
}
7、编辑Dialog
private void showInputDialog() {/*@setView 装入一个EditView*/final EditText editText = new EditText(MainActivity.this);AlertDialog.Builder inputDialog = new AlertDialog.Builder(MainActivity.this);inputDialog.setTitle("我是一个输入Dialog").setView(editText);inputDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this,editText.getText().toString(), Toast.LENGTH_SHORT).show();}}).show();
}
8、自定义Dialog
<!-- res/layout/dialog_customize.xml-->
<!-- 自定义View -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent"><EditTextandroid:id="@+id/edit_text"android:layout_width="match_parent"android:layout_height="wrap_content" />
</LinearLayout>
private void showCustomizeDialog() {/* @setView 装入自定义View ==> R.layout.dialog_customize* 由于dialog_customize.xml只放置了一个EditView，因此和图8一样* dialog_customize.xml可自定义更复杂的View*/AlertDialog.Builder customizeDialog = new AlertDialog.Builder(MainActivity.this);final View dialogView = LayoutInflater.from(MainActivity.this).inflate(R.layout.dialog_customize,null);customizeDialog.setTitle("我是一个自定义Dialog");customizeDialog.setView(dialogView);customizeDialog.setPositiveButton("确定",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 获取EditView中的输入内容EditText edit_text = (EditText) dialogView.findViewById(R.id.edit_text);Toast.makeText(MainActivity.this,edit_text.getText().toString(),Toast.LENGTH_SHORT).show();}});customizeDialog.show();
}
复写回调函数
/* 复写Builder的create和show函数，可以在Dialog显示前实现必要设置* 例如初始化列表、默认选项等* @create 第一次创建时调用* @show 每次显示时调用*/
private void showListDialog() {final String[] items = { "我是1","我是2","我是3","我是4" };AlertDialog.Builder listDialog = new AlertDialog.Builder(MainActivity.this){@Overridepublic AlertDialog create() {items[0] = "我是No.1";return super.create();}@Overridepublic AlertDialog show() {items[1] = "我是No.2";return super.show();}};listDialog.setTitle("我是一个列表Dialog");listDialog.setItems(items, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// ...To-do}});/* @setOnDismissListener Dialog销毁时调用* @setOnCancelListener Dialog关闭时调用*/listDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {public void onDismiss(DialogInterface dialog) {Toast.makeText(getApplicationContext(),"Dialog被销毁了", Toast.LENGTH_SHORT).show();}});listDialog.show();
}