使用的系统默认的progressdialog显示如下：
ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
// 设置ProgressDialog 标题
progressDialog.setTitle("下载提示");
// 设置ProgressDialog 提示信息
progressDialog.setMessage("当前下载进度:");
// 设置ProgressDialog 是否可以按退回按键取消
progressDialog.setCancelable(true);
progressDialog.show();
progressDialog.setMax(18268544);
progressDialog.setProgress(1866954);
Paste_Image.png
现在需要显示文件总大小和当前进度，以M为单位。
效果如下：
Paste_Image.png
代码如下（完全参照系统的progressdialog）
public class DownloadProgressDialog extends AlertDialog {
/** Creates a ProgressDialog with a horizontal progress bar.
*/
public static final int STYLE_HORIZONTAL = 1;
private String mProgressNumberFormat;
private NumberFormat mProgressPercentFormat;
private ProgressBar mProgress;
private Handler mViewUpdateHandler;
private TextView mProgressNumber;
private TextView mProgressPercent;
private TextView mMessageView;
private int mProgressStyle = STYLE_SPINNER;
private int mMax;
private int mProgressVal;
private int mSecondaryProgressVal;
private int mIncrementBy;
private int mIncrementSecondaryBy;
private Drawable mProgressDrawable;
private Drawable mIndeterminateDrawable;
private CharSequence mMessage;
private boolean mIndeterminate;
private boolean mHasStarted;
protected DownloadProgressDialog(Context context) {
super(context);
initFormats();
}
protected DownloadProgressDialog(Context context, boolean cancelable, OnCancelListener cancelListener) {
super(context, cancelable, cancelListener);
initFormats();
}
protected DownloadProgressDialog(Context context, @StyleRes int themeResId) {
super(context, themeResId);
initFormats();
}
private void initFormats() {
mProgressNumberFormat = "%1.2fM/%2.2fM";
mProgressPercentFormat = NumberFormat.getPercentInstance();
mProgressPercentFormat.setMaximumFractionDigits(0);
}
public static DownloadProgressDialog show(Context context, CharSequence title,
CharSequence message) {
return show(context, title, message, false);
}
public static DownloadProgressDialog show(Context context, CharSequence title,
CharSequence message, boolean indeterminate) {
return show(context, title, message, indeterminate, false, null);
}
public static DownloadProgressDialog show(Context context, CharSequence title,
CharSequence message, boolean indeterminate, boolean cancelable) {
return show(context, title, message, indeterminate, cancelable, null);
}
public static DownloadProgressDialog show(Context context, CharSequence title,
CharSequence message, boolean indeterminate,
boolean cancelable, OnCancelListener cancelListener) {
DownloadProgressDialog dialog = new DownloadProgressDialog(context);
dialog.setTitle(title);
dialog.setMessage(message);
dialog.setIndeterminate(indeterminate);
dialog.setCancelable(cancelable);
dialog.setOnCancelListener(cancelListener);
dialog.show();
return dialog;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
LayoutInflater inflater = LayoutInflater.from(getContext());
if (mProgressStyle == STYLE_HORIZONTAL) {
mViewUpdateHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
/* Update the number and percent */
double progress =(double) mProgress.getProgress()/(double)(1024*1024);
double max = (double)mProgress.getMax()/(double)(1024*1024);
if (mProgressNumberFormat != null) {
String format = mProgressNumberFormat;
mProgressNumber.setText(String.format(format, progress, max));
} else {
mProgressNumber.setText("");
}
if (mProgressPercentFormat != null) {
double percent = (double) progress / (double) max;
SpannableString tmp = new SpannableString(mProgressPercentFormat.format(percent));
tmp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD),
0, tmp.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
mProgressPercent.setText(tmp);
} else {
mProgressPercent.setText("");
}
}
};
View view = inflater.inflate(R.layout.alert_dialog_progress,null);
mProgress = (ProgressBar) view.findViewById(R.id.progress);
mProgressNumber = (TextView) view.findViewById(R.id.progress_number);
mProgressPercent = (TextView) view.findViewById(R.id.progress_percent);
setView(view);
}else{
View view = inflater.inflate(R.layout.progress_dialog, null);
mProgress = (ProgressBar) view.findViewById(R.id.progress);
mMessageView = (TextView) view.findViewById(R.id.message);
setView(view);
}
if (mMax > 0) {
setMax(mMax);
}
if (mProgressVal > 0) {
setProgress(mProgressVal);
}
if (mSecondaryProgressVal > 0) {
setSecondaryProgress(mSecondaryProgressVal);
}
if (mIncrementBy > 0) {
incrementProgressBy(mIncrementBy);
}
if (mIncrementSecondaryBy > 0) {
incrementSecondaryProgressBy(mIncrementSecondaryBy);
}
if (mProgressDrawable != null) {
setProgressDrawable(mProgressDrawable);
}
if (mIndeterminateDrawable != null) {
setIndeterminateDrawable(mIndeterminateDrawable);
}
if (mMessage != null) {
setMessage(mMessage);
}
setIndeterminate(mIndeterminate);
onProgressChanged();
super.onCreate(savedInstanceState);
}
@Override
public void onStart() {
super.onStart();
mHasStarted = true;
}
@Override
protected void onStop() {
super.onStop();
mHasStarted = false;
}
public void setProgress(int value) {
if (mHasStarted) {
mProgress.setProgress(value);
onProgressChanged();
} else {
mProgressVal = value;
}
}
public void setSecondaryProgress(int secondaryProgress) {
if (mProgress != null) {
mProgress.setSecondaryProgress(secondaryProgress);
onProgressChanged();
} else {
mSecondaryProgressVal = secondaryProgress;
}
}
public int getProgress() {
if (mProgress != null) {
return mProgress.getProgress();
}
return mProgressVal;
}
public int getSecondaryProgress() {
if (mProgress != null) {
return mProgress.getSecondaryProgress();
}
return mSecondaryProgressVal;
}
public int getMax() {
if (mProgress != null) {
return mProgress.getMax();
}
return mMax;
}
public void setMax(int max) {
if (mProgress != null) {
mProgress.setMax(max);
onProgressChanged();
} else {
mMax = max;
}
}
public void incrementProgressBy(int diff) {
if (mProgress != null) {
mProgress.incrementProgressBy(diff);
onProgressChanged();
} else {
mIncrementBy += diff;
}
}
public void incrementSecondaryProgressBy(int diff) {
if (mProgress != null) {
mProgress.incrementSecondaryProgressBy(diff);
onProgressChanged();
} else {
mIncrementSecondaryBy += diff;
}
}
public void setProgressDrawable(Drawable d) {
if (mProgress != null) {
mProgress.setProgressDrawable(d);
} else {
mProgressDrawable = d;
}
}
public void setIndeterminateDrawable(Drawable d) {
if (mProgress != null) {
mProgress.setIndeterminateDrawable(d);
} else {
mIndeterminateDrawable = d;
}
}
public void setIndeterminate(boolean indeterminate) {
if (mProgress != null) {
mProgress.setIndeterminate(indeterminate);
} else {
mIndeterminate = indeterminate;
}
}
public boolean isIndeterminate() {
if (mProgress != null) {
return mProgress.isIndeterminate();
}
return mIndeterminate;
}
@Override
public void setMessage(CharSequence message) {
if (mProgress != null) {
if (mProgressStyle == STYLE_HORIZONTAL) {
super.setMessage(message);
} else {
mMessageView.setText(message);
}
} else {
mMessage = message;
}
}
public void setProgressStyle(int style) {
mProgressStyle = style;
}
/**
* Change the format of the small text showing current and maximum units
* of progress. The default is "%1d/%2d".
* Should not be called during the number is progressing.
* @param format A string passed to {@link String#format String.format()};
* use "%1d" for the current number and "%2d" for the maximum. If null,
* nothing will be shown.
*/
public void setProgressNumberFormat(String format) {
mProgressNumberFormat = format;
onProgressChanged();
}
/**
* Change the format of the small text showing the percentage of progress.
* The default is
* {@link NumberFormat#getPercentInstance() NumberFormat.getPercentageInstnace().}
* Should not be called during the number is progressing.
* @param format An instance of a {@link NumberFormat} to generate the
* percentage text. If null, nothing will be shown.
*/
public void setProgressPercentFormat(NumberFormat format) {
mProgressPercentFormat = format;
onProgressChanged();
}
private void onProgressChanged() {
if (mProgressStyle == STYLE_HORIZONTAL) {
if (mViewUpdateHandler != null && !mViewUpdateHandler.hasMessages(0)) {
mViewUpdateHandler.sendEmptyMessage(0);
}
}
}
}
布局文件alert_dialog_progress
progress_dialog
使用方法和progressdialog完全一下：
DownloadProgressDialog progressDialog = new DownloadProgressDialog(this);
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
// 设置ProgressDialog 标题
progressDialog.setTitle("下载提示");
// 设置ProgressDialog 提示信息
progressDialog.setMessage("当前下载进度:");
// 设置ProgressDialog 标题图标
//progressDialog.setIcon(R.drawable.a);
// 设置ProgressDialog 进度条进度
// 设置ProgressDialog 的进度条是否不明确
progressDialog.setIndeterminate(false);
// 设置ProgressDialog 是否可以按退回按键取消
progressDialog.setCancelable(true);
progressDialog.show();
progressDialog.setMax(18268544);
progressDialog.setProgress(1866954);