ProgressDialog 繼承自AlertDialog，AlertDialog繼承自Dialog
public class ProgressDialog extends AlertDialog
ProgressDialog的創建方式有兩種，一種是new
ProgressDialog，
一種是調用
ProgressDialog
的靜態
方法
show()
創建並顯示，這種進度條只能是圓形條
。
常用方法
- setProgressStyle：設置進度條風格，風格為圓形，旋轉的。
- setTitlt：設置標題
- setMessage：設置提示信息；
- setIcon：設置標題圖標；
- setIndeterminate：設置ProgressDialog 的進度條是否不明確；這個屬性對於ProgressDailog默認的轉輪模式沒有實際意義，默認下設置為true，它僅僅對帶有ProgressBar的Dialog有作用。修改這個屬性為false后可以實時更新進度條的進度。
- setCancelable：設置ProgressDialog 是否可以按返回鍵取消；
- cancelListner:當前Dialog強制取消之后將會被執行，通常用來清理未完成的任務。
- setButton：設置ProgressDialog 的一個Button（需要監聽Button事件）；
- show：顯示ProgressDialog。
- cancel：刪除progressdialog
- dismiss： 刪除progressdialog 作用和cancel相同
- setMax(int)、getMax：設置最大進度條的值
- setProgress(int)、getProgress：更新進度條，當然一般都需要Handler的結合來更新進度條
- incrementProgressBy(int)增加進度條
- setProgressDrawable：設置progress發生變化時的進度指示條的背景圖
Mainactivity
public class MainActivity extends ListActivity {
private ProgressDialog dialog;
private AlertDialog alertDialog;
private ProgressDialogFragment dialogFragment;
private Handler mHandler = new Handler() {
@Override
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case 0:
dialog.cancel();// cancel和dismiss唯一的區別是，調用cancel方法會【回調】OnCancelListener
break;
case 1:
int progress = (Integer) msg.obj;
if (progress < 20) {
dialog.incrementProgressBy(5);// 增加進度條的進度
mHandler.sendMessageDelayed(Message.obtain(mHandler, 1, progress + 1), 150);
} else dialog.dismiss();
break;
case 2:
alertDialog.dismiss();
break;
case 3:
getFragmentManager().beginTransaction().remove(dialogFragment).commit();
break;
}
};
};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] array = { "ProgressDialog.STYLE_SPINNER：不確定的圓形滾動條",//
"ProgressDialog.STYLE_HORIZONTAL：確定的水平滾動條", //
"通過AlertDialog實現不確定圓形滾動條效果，其View包含一個ProgressBar",//
"通過DialogFragment實現不確定圓形滾動條效果，其View包含一個ProgressBar", };
setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, new ArrayList<String>(Arrays.asList(array))));
Fragment fragment = getFragmentManager().findFragmentByTag("ProgressDialogFragment");
//旋轉屏幕后dialogFragment為空，但是findFragmentByTag的結果不為空，所以dialogFragment將永遠不會消失
if (fragment != null) {
if (dialogFragment == null) Toast.makeText(MainActivity.this, "dialogFragment為空，findFragmentByTag不為空", Toast.LENGTH_SHORT).show();
getFragmentManager().beginTransaction().remove(fragment).commit();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mHandler != null) mHandler.removeCallbacksAndMessages(null);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
switch (position) {
case 0://旋轉屏幕后直接消失
showPD();
mHandler.sendEmptyMessageDelayed(0, 3000);
break;
case 1://旋轉屏幕后直接消失
showHorizontalPD();
mHandler.sendMessageDelayed(Message.obtain(mHandler, 1, 0), 150);
break;
case 2://旋轉屏幕后直接消失
showAlertDialog();
mHandler.sendEmptyMessageDelayed(2, 3000);
break;
case 3://旋轉屏幕后會重新創建
showDialogFragment();
mHandler.sendEmptyMessageDelayed(3, 3000);
break;
}
}
private void showPD() {
dialog = new ProgressDialog(this);
dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);//轉盤
dialog.setCancelable(false);
dialog.setCanceledOnTouchOutside(false);
dialog.setTitle("提示");
dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
Toast.makeText(MainActivity.this, "消失了", Toast.LENGTH_SHORT).show();
}
});
dialog.setMessage("正在加載，請稍后……");
dialog.show();
}
private void showHorizontalPD() {
dialog = new ProgressDialog(this);
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setCancelable(true);
dialog.setCanceledOnTouchOutside(false);
dialog.setIcon(R.drawable.ic_launcher);//這里指的是標題左側的圖標。注意：如果沒有設置title只設置Icon的話，是不會顯示圖標的
dialog.setTitle("提示");
dialog.setMax(100);
dialog.setButton(DialogInterface.BUTTON_POSITIVE, "確定…", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "確定", Toast.LENGTH_SHORT).show();
}
});
dialog.setButton(DialogInterface.BUTTON_NEGATIVE, "取消…", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "取消", Toast.LENGTH_SHORT).show();
}
});
dialog.setMessage("正在加載，請稍后……");
dialog.show();
}
private void showAlertDialog() {
alertDialog = new AlertDialog.Builder(this).setView(R.layout.layout).create();
alertDialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);//設置Dialog背景透明效果
alertDialog.show();
}
private void showDialogFragment() {
dialogFragment = ProgressDialogFragment.newInstance("加載中…");
dialogFragment.show(getFragmentManager(), "ProgressDialogFragment");
}
}
ProgressDialogFragment
public class ProgressDialogFragment extends DialogFragment {
/**構造時把傳入的參數帶進來，注意一定要通過Bundle及setArguments傳遞數據*/
public static ProgressDialogFragment newInstance(String message) {
Bundle bundle = new Bundle();//把所有需要傳遞的數據都放在Bundle中
bundle.putString("message", message);
ProgressDialogFragment dialog = new ProgressDialogFragment();
dialog.setArguments(bundle);//通過setArguments把Bundle傳遞過去
return dialog;
}
@SuppressLint("InflateParams")
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
View contentView = getActivity().getLayoutInflater().inflate(R.layout.layout, null);
TextView tv_messag = (TextView) contentView.findViewById(R.id.tv_messag);
if (getArguments() != null && !TextUtils.isEmpty(getArguments().getString("message"))) {
tv_messag.setVisibility(View.VISIBLE);
tv_messag.setText(getArguments().getString("message"));
} else tv_messag.setVisibility(View.GONE);
Dialog dialog = new Dialog(getActivity());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);//設置Dialog沒有標題。需在setContentView之前設置，在之后設置會報錯
dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);//設置Dialog背景透明效果
dialog.setCancelable(false);
dialog.setContentView(contentView);
return dialog;
}
}
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