Android 常用dialog提示对话框

在android应用程序中，经常需要用到dialog对话框让用户知道现在所在进行的操作(比如耗时的操作)，或者提示某些信息和状态等，算是比较常用的一个知识点；

1、简单对话框

protected void dialog1(AlertDialog.Builder builder) {
builder.setTitle("标题");
builder.setPositiveButton("确定", null);
builder.setIcon(R.drawable.ic_launcher);
builder.setMessage("简单消息框");
builder.show();
}

2、带自定义内容对话框

protected void study2(AlertDialog.Builder builder) {
builder.setTitle("标题");
builder.setView(new EditText(this));
builder.setPositiveButton("确定", null);
builder.setIcon(android.R.drawable.ic_dialog_info);
builder.setMessage("简单消息框");
builder.show();
}

3、带单选按钮对话框

protected void study3(AlertDialog.Builder builder) {
builder.setTitle("请选择")
.setIcon(android.R.drawable.ic_dialog_info)
.setSingleChoiceItems(
new String[] { "item1", "item2", "item3", "item4" }, 0,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
Log.e("选择", "" + which);
dialog.dismiss();
}
}).setNegativeButton("取消", null).show();
}

在选择了某一项之后，onClick回调事件会把选择的项的索引返回给用户；

4、带多选组合框对话框

protected void study4(AlertDialog.Builder builder) {
builder.setTitle("请选择")
.setIcon(android.R.drawable.ic_dialog_info)
.setMultiChoiceItems(
new String[] { "item1", "item2", "item3", "item4" },
new boolean[] { true, true, false, true },
new OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which, boolean isChecked) {
ListView lv = ((AlertDialog) dialog).getListView();
Log.e("项" + which, "选择" + lv.getCheckedItemPositions().get(which));
}
}).setNegativeButton("取消", null).show();
}

在多选对话框中，选择了某一项并不会导致对话框隐藏，同样android也通过回调接口返回用户所选择的项；



5、进度条对话框

public void study5() {
ProgressDialog dialog = new ProgressDialog(MainActivity.this);
dialog.setCancelable(true);
dialog.setMessage("加载中...");
// dialog.setTitle("进度条框窗口");
// dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
// dialog.setMax(100);
dialog.show();
}

6、除了上述的添加用户界面友好提示的方法，还可以通过WindowManager添加一个View到界面上向用户反馈信息，此种方法也更灵活

protected void study6() {
ViewGroup vg = (ViewGroup) getLayoutInflater().inflate(R.layout.dia,null);
pb = (ProgressBar) vg.findViewById(R.id.pb);
vg.removeAllViews();
WindowManager.LayoutParams lp = new WindowManager.LayoutParams(160,
160, WindowManager.LayoutParams.TYPE_APPLICATION,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSLUCENT);
WindowManager windowManager = (WindowManager)getSystemService(Context.WINDOW_SERVICE);
windowManager.addView(pb, lp);
}

重要的步骤即是从lp开始，设置LayoutParams参数，然后添加到窗口；



7.使用Window将view添加到window上

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
AlertDialog dialog = builder.show();
Window window = dialog.getWindow();
window.setContentView(R.layout.dialoglayout);

8.使用style来设置样式

<!-- 自定义Dialog -->
<style name="MyDialog" parent="@android:style/Theme.Dialog">
<item name="android:windowFrame">@null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowIsFloating">true</item>
<item name="android:windowContentOverlay">@null</item>
</style>

//

Dialog dialog1 = new Dialog(getActivity(), R.style.MyDialog);
dialog1.setContentView(R.layout.dialoglayout);
dialog1.show();