android中自定义进度条样式（ProgressDialog）
先发一下系统自带的进度条和自定义进度条外观图片：
图1
图2
图1是系统自带的进度条，图2是自定义样式后的进度条。为了方便只更改进度条外观，其他的对话框属性及样式不做修改。
要做到以上效果的修改，需要4个步骤：
1、自定义MyProgressDialog类，虽说是自定义，但实际上是照抄系统自带的ProgressDialog，只是修改其中的某些写死了样式的代码。
//包名跟系统的一样，不能更改
package android.app;
import java.text.NumberFormat;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.StyleSpan;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;
//资源文件修改
//import com.android.internal.R;
import com.zhao.transfer.R;
public class MyProgressDialog extends AlertDialog {
/** Creates a ProgressDialog with a circular, spinning progress
* bar. This is the default.
*/
public static final int STYLE_SPINNER = 0;
/** Creates a ProgressDialog with a horizontal progress bar.
*/
public static final int STYLE_HORIZONTAL = 1;
private ProgressBar mProgress;
private TextView mMessageView;
private int mProgressStyle = STYLE_SPINNER;
private TextView mProgressNumber;
private String mProgressNumberFormat;
private TextView mProgressPercent;
private NumberFormat mProgressPercentFormat;
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;
private Handler mViewUpdateHandler;
private Context context;
public MyProgressDialog(Context context) {
super(context);
this.context = context;
initFormats();
}
public MyProgressDialog(Context context, int theme) {
super(context, theme);
initFormats();
}
private void initFormats() {
mProgressNumberFormat = "%1d/%2d";
mProgressPercentFormat = NumberFormat.getPercentInstance();
mProgressPercentFormat.setMaximumFractionDigits(0);
}
public static ProgressDialog show(Context context, CharSequence title,
CharSequence message) {
return show(context, title, message, false);
}
public static ProgressDialog show(Context context, CharSequence title,
CharSequence message, boolean indeterminate) {
return show(context, title, message, indeterminate, false, null);
}
public static ProgressDialog show(Context context, CharSequence title,
CharSequence message, boolean indeterminate, boolean cancelable) {
return show(context, title, message, indeterminate, cancelable, null);
}
public static ProgressDialog show(Context context, CharSequence title,
CharSequence message, boolean indeterminate,
boolean cancelable, OnCancelListener cancelListener) {
ProgressDialog dialog = new ProgressDialog(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(context);
TypedArray a = context.obtainStyledAttributes(null,
//此处修改了样式文件，引用自定义样式attrs.xml
R.styleable.AlertDialog,
R.attr.alertDialogStyle, 0);
if (mProgressStyle == STYLE_HORIZONTAL) {
/* Use a separate handler to update the text views as they
* must be updated on the same thread that created them.
*/
mViewUpdateHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
/* Update the number and percent */
int progress = mProgress.getProgress();
int max = mProgress.getMax();
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(a.getResourceId(
//此处修改了样式文件，引用自定义样式 attrs.xml
R.styleable.AlertDialog_horizontalProgressLayout,
//此处修改了布局文件 progress_dialog.xml
R.layout.progress_dialog), 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(a.getResourceId(
com.android.internal.R.styleable.AlertDialog_progressLayout,
R.layout.progress_dialog), null);
mProgress = (ProgressBar) view.findViewById(R.id.progress);
mMessageView = (TextView) view.findViewById(R.id.message);
setView(view);*/
}
a.recycle();
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);
}
}
}
}
2、自定义ProgressDialog的布局文件（progress_dialog.xml），为了方便照抄系统自带的就行了，只是修改进度条style属性：
3、自定义ProgressDialog的样式，需要在两个文件中添加内容attrs.xml 和 styles.xml：
attrs.xml文件添加如下内容：
styles.xml文件中添加如下内容：
4、自定义进度条的drawable（progress_layer_list.xml），文件内容如下：
-
-
-
经以上修改后，就可以使用自定义的进度对话框了，跟使用系统自带的一样，并没有什么差别。
MyProgressDialog progress = null;
.....
if (progress == null) {
progress = new MyProgressDialog(this);
progress.setTitle(“文件接收进度”);
progress.setIcon(android.R.drawable.ic_popup_sync);
progress.setMessage(“张国荣，许冠杰--沉默是金.mp3”);
progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progress.setProgress(cur);
progress.setMax(100);
progress.show();
} else if (progress != null) {
progress.setMessage(msg);
progress.setProgress(cur);
}