我正在拼命地在锁屏和桌面上显示我的音乐小部件。 但没有成功:(
我已经看了所有的SO和谷歌，教程和官方的Android文档和havnt发现为什么我的小部件没有在锁定屏幕上显示（At All）..
它有点简单的小部件，设计非常简单，所以我没有看到它没有显示的原因。
我正在尝试使用KitKat Os实现我的One Plus One。
这是代码（希望它也可以帮助其他用户创建他们的小部件）：
Java代码：
public class MusicManager extends AppWidgetProvider {
boolean isLockScreen = false;
RemoteViews remoteViews;
Bundle options;
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
Log.d("Widget Reciever", "Is Playing - " + Main.isPlaying);
// Get all ids
ComponentName thisWidget = new ComponentName(context,
MusicManager.class);
int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
for (int widgetId : allWidgetIds) {
options = appWidgetManager.getAppWidgetOptions(widgetId);
menageResorces(context);
// Play Intent
initPlayIntent(context, allWidgetIds, remoteViews, appWidgetManager, widgetId);
// Next Intent
initNextIntent(context, allWidgetIds, remoteViews, appWidgetManager, widgetId);
// Prev Intent
initPrevIntent(context, allWidgetIds, remoteViews, appWidgetManager, widgetId);
// Main Intent
initMainIntent(context, allWidgetIds, remoteViews, appWidgetManager, widgetId);
//Shuffle
initShuffleIntent(context, appWidgetIds, remoteViews, appWidgetManager, widgetId);
//Repeat
initRepeatIntent(context, appWidgetIds, remoteViews, appWidgetManager, widgetId);
//Bypass
initBypassIntent(context, appWidgetIds, remoteViews, appWidgetManager, widgetId);
}
}
private void initPlayIntent(Context context, int[] appWidgetIds, RemoteViews remoteViews,
AppWidgetManager appWidgetManager, int widgetId){
Intent playIntent = new Intent(context, MusicManager.class);
playIntent.setAction(Constants.ACTION.PLAY_ACTION);
playIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
PendingIntent pendingPlayIntent = PendingIntent.getBroadcast(context,
0, playIntent, PendingIntent.FLAG_UPDATE_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.btnPlay, pendingPlayIntent);
appWidgetManager.updateAppWidget(widgetId, remoteViews);
}
private void initNextIntent(Context context, int[] appWidgetIds, RemoteViews remoteViews,
AppWidgetManager appWidgetManager, int widgetId){
Intent fastForwardIntent = new Intent(context, MusicManager.class);
fastForwardIntent.setAction(Constants.ACTION.NEXT_ACTION);
fastForwardIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
PendingIntent pendingNextIntent = PendingIntent.getBroadcast(context,
0, fastForwardIntent, PendingIntent.FLAG_UPDATE_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.btnNext, pendingNextIntent);
appWidgetManager.updateAppWidget(widgetId, remoteViews);
}
private void initPrevIntent(Context context, int[] appWidgetIds, RemoteViews remoteViews,
AppWidgetManager appWidgetManager, int widgetId){
Intent fastBackwardIntent = new Intent(context, MusicManager.class);
fastBackwardIntent.setAction(Constants.ACTION.PREV_ACTION);
fastBackwardIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
PendingIntent pendingPrevIntent = PendingIntent.getBroadcast(context,
0, fastBackwardIntent, PendingIntent.FLAG_UPDATE_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.btnPrevious, pendingPrevIntent);
appWidgetManager.updateAppWidget(widgetId, remoteViews);
}
private void initShuffleIntent(Context context, int[] appWidgetIds, RemoteViews remoteViews,
AppWidgetManager appWidgetManager, int widgetId){
Intent shuffleIntent = new Intent(context, MusicManager.class);
shuffleIntent.setAction(Constants.ACTION.SHUFFLE);
shuffleIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
PendingIntent pendingShuffleIntent = PendingIntent.getBroadcast(context,
0, shuffleIntent, PendingIntent.FLAG_UPDATE_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.btnShuffle, pendingShuffleIntent);
appWidgetManager.updateAppWidget(widgetId, remoteViews);
}
private void initRepeatIntent(Context context, int[] appWidgetIds, RemoteViews remoteViews,
AppWidgetManager appWidgetManager, int widgetId){
Intent repeatIntent = new Intent(context, MusicManager.class);
repeatIntent.setAction(Constants.ACTION.REPEAT);
repeatIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
PendingIntent pendingRepeatIntent = PendingIntent.getBroadcast(context,
0, repeatIntent, PendingIntent.FLAG_UPDATE_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.btnRepeat, pendingRepeatIntent);
appWidgetManager.updateAppWidget(widgetId, remoteViews);
}
private void initBypassIntent(Context context, int[] appWidgetIds, RemoteViews remoteViews,
AppWidgetManager appWidgetManager, int widgetId){
Intent bypassIntent = new Intent(context, MusicManager.class);
bypassIntent.setAction(Constants.ACTION.BYPASS);
bypassIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
PendingIntent pendingBypassIntent = PendingIntent.getBroadcast(context,
0, bypassIntent, PendingIntent.FLAG_UPDATE_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.bypass, pendingBypassIntent);
appWidgetManager.updateAppWidget(widgetId, remoteViews);
}
private void initMainIntent(Context context, int[] appWidgetIds, RemoteViews remoteViews,
AppWidgetManager appWidgetManager, int widgetId){
Intent mainIntent = new Intent(context, MusicManager.class);
mainIntent.setAction(Constants.ACTION.MAIN_ACTION);
mainIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
PendingIntent pendingMainIntent = PendingIntent.getBroadcast(context,
0, mainIntent, PendingIntent.FLAG_UPDATE_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.albumCover, pendingMainIntent);
appWidgetManager.updateAppWidget(widgetId, remoteViews);
}
@Override
public void onReceive(Context context, Intent intent) {
// v1.5 fix that doesn't call onDelete Action
final String action = intent.getAction();
if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)) {
Log.d("Widget Reciever", "Widget DELETED");
//The widget is being deleted off the desktop
final int appWidgetId = intent.getExtras().getInt(
AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
this.onDeleted(context, new int[] { appWidgetId });
}
} else {
//Manage Play
if (intent.getAction().equals(Constants.ACTION.PLAY_ACTION)) {
Log.d("Widget Reciever", "Widget Play");
//If Main is running
if(isRunning(context)){
Log.d("Widget Reciever", "Activity Running");
Main.btnPlay.performClick();
}
//If Main is NOT running
else{
startMainActivity(context);
}
//Manage Next
} else if (intent.getAction().equals(Constants.ACTION.NEXT_ACTION)) {
Log.d("Widget Reciever", "Widget Next");
//If Main is running
if(isRunning(context)){
Main.btnNext.performClick();
}
//If Main is NOT running
else{
startMainActivity(context);
}
//Manage Previous
} else if (intent.getAction().equals(Constants.ACTION.PREV_ACTION)) {
Log.d("Widget Reciever", "Widget Previous");
//If Main is running
if(isRunning(context)){
Main.btnPrevious.performClick();
}
//If Main is NOT running
else{
startMainActivity(context);
}
//Manage Main
} else if (intent.getAction().equals(Constants.ACTION.MAIN_ACTION)) {
Log.d("Widget Reciever", "Widget Main");
if(!isRunning(context)){
startMainActivity(context);
}
else{
moveToFront(context) ;
}
//Manage Shuffle
} else if (intent.getAction().equals(Constants.ACTION.SHUFFLE)) {
Log.d("Widget Reciever", "Widget Shuffle");
if(isRunning(context)){
Main.btnShuffle.performClick();
}
else{
}
//Manage Repeat
} else if (intent.getAction().equals(Constants.ACTION.REPEAT)) {
Log.d("Widget Reciever", "Widget Repeat");
if(isRunning(context)){
Main.btnRepeat.performClick();
}
else{
}
//Manage Bypass
} else if (intent.getAction().equals(Constants.ACTION.BYPASS)) {
Log.d("Widget Reciever", "Widget Bypass");
if(isRunning(context)){
Main.bypass.performClick();
}
else{
}
}
super.onReceive(context, intent);
}
}
@SuppressLint("InlinedApi")
private void menageResorces(Context ctx){
//Check if in lock screen or desktop
// if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
// try {
// int category = options.getInt(AppWidgetManager.OPTION_APPWIDGET_HOST_CATEGORY, -1);
// isLockScreen = category == AppWidgetProviderInfo.WIDGET_CATEGORY_KEYGUARD;
// Log.d("Widget Reciever", "Widget Can Be In Lock Screen");
// } catch (NullPointerException e) {
// isLockScreen = false;
// }
// }
// else{
// isLockScreen = false;
// }
// if(isLockScreen == true){
// Log.d("Widget Reciever", "Widget Is In Lock Screen");
// remoteViews = new RemoteViews(ctx.getPackageName(),
// R.layout.lock_widget_layout);
// }else{
Log.d("Widget Reciever", "Widget Is NOT In Lock Screen");
remoteViews = new RemoteViews(ctx.getPackageName(),
R.layout.widget_layout);
// }
//Set album cover
try {
Bitmap icon;
try {
MediaMetadataRetriever mmr = new MediaMetadataRetriever();
mmr.setDataSource(Main.songBeingPlayedPath);
byte [] data = mmr.getEmbeddedPicture();
icon = BitmapFactory.decodeByteArray(data, 0, data.length);
icon = scaleDownBitmap(icon, 100, ctx);
} catch (NullPointerException e) {
icon = BitmapFactory.decodeResource(ctx.getResources(),
R.drawable.list_image);
icon = scaleDownBitmap(icon, 100, ctx);
}catch (IllegalArgumentException e) {
icon = BitmapFactory.decodeResource(ctx.getResources(),
R.drawable.list_image);
icon = scaleDownBitmap(icon, 100, ctx);
}
try {
remoteViews.setImageViewBitmap(R.id.albumCover, icon);
} catch (IllegalArgumentException e) {
try {
icon = BitmapFactory.decodeResource(ctx.getResources(),
R.drawable.list_image);
icon = scaleDownBitmap(icon, 100, ctx);
remoteViews.setImageViewBitmap(R.id.albumCover, icon);
} catch (IllegalArgumentException e1) {
e1.printStackTrace();
}
}
} catch (NullPointerException e) {
}
//Set play button image
try {
//Set Song Label
if(Main.songBeingPlayedTitle != null && Main.songBeingPlayedTitle.length() > 0){
remoteViews.setTextViewText(R.id.songName, Main.songBeingPlayedTitle);
try {
if(Main.cameFromPlayerButtonWithShuffle == true)
remoteViews.setTextViewText(R.id.album_name, Main.songListShuffle.get(Main.currentSongIndex).getAlbum());
else
remoteViews.setTextViewText(R.id.album_name, Main.songListAdapter.getItem(Main.currentSongIndex).getAlbum());
} catch (NullPointerException e) {
}
}
//Set Un Active
else{
remoteViews.setTextViewText(R.id.songName, ctx.getString(R.string.player_not_active));
remoteViews.setTextViewText(R.id.album_name,"");
}
if(Main.isPlaying == true){
Log.d("Widget Reciever", "Set Pause Button");
remoteViews.setImageViewResource(R.id.btnPlay, R.drawable.btn_pause);
}
else{
Log.d("Widget Reciever", "Set Play Button");
remoteViews.setImageViewResource(R.id.btnPlay, R.drawable.btn_play);
}
if(Main.isRepeat == true){
Log.d("Widget Reciever", "Set Repeat On");
remoteViews.setImageViewResource(R.id.btnRepeat, R.drawable.btn_repeat_focused);
}
else{
Log.d("Widget Reciever", "Set Repeat Off");
remoteViews.setImageViewResource(R.id.btnRepeat, R.drawable.btn_repeat);
}
if(Main.isShuffle == true){
Log.d("Widget Reciever", "Set Shuffle On");
remoteViews.setImageViewResource(R.id.btnShuffle, R.drawable.btn_shuffle_focused);
}
else{
Log.d("Widget Reciever", "Set Shuffle Off");
remoteViews.setImageViewResource(R.id.btnShuffle, R.drawable.btn_shuffle);
}
if(Main.bypassed == true){
Log.d("Widget Reciever", "Set Bypass On");
remoteViews.setTextViewText(R.id.bypass, ctx.getString(R.string.bypass_440));
}
else{
Log.d("Widget Reciever", "Set Bypass Off");
remoteViews.setTextViewText(R.id.bypass, ctx.getString(R.string.bypass_432));
}
} catch (NullPointerException e) {
}
}
private void startMainActivity(Context ctx){
Intent mainIntentStart = new Intent (ctx, Main.class);
mainIntentStart.setFlags (Intent.FLAG_ACTIVITY_NEW_TASK);
ctx.startActivity (mainIntentStart);
}
//Is Activity Running
public boolean isRunning(Context ctx) {
ActivityManager activityManager = (ActivityManager) ctx.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningTaskInfo> tasks = activityManager.getRunningTasks(Integer.MAX_VALUE);
for (RunningTaskInfo task : tasks) {
if (ctx.getPackageName().equalsIgnoreCase(task.baseActivity.getPackageName()))
return true;
}
return false;
}
//Move Activity To Front
protected void moveToFront(Context context) {
final ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
final List<RunningTaskInfo> recentTasks = activityManager.getRunningTasks(Integer.MAX_VALUE);
for (int i = 0; i < recentTasks.size(); i++)
{
// bring to front
if (recentTasks.get(i).baseActivity.toShortString().indexOf("com.appums.music_pitcher") > -1) {
activityManager.moveTaskToFront(recentTasks.get(i).id, ActivityManager.MOVE_TASK_WITH_HOME);
}
}
}
public static Bitmap scaleDownBitmap(Bitmap photo, int newHeight, Context context) {
final float densityMultiplier = context.getResources().getDisplayMetrics().density;
int h= (int) (newHeight*densityMultiplier);
int w= (int) (h * photo.getWidth()/((double) photo.getHeight()));
photo=Bitmap.createScaledBitmap(photo, w, h, true);
return photo;
}
窗口小部件提供程序Xml：
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:initialLayout="@layout/widget_layout"
android:previewImage="@drawable/widget_preview"
android:minWidth="216dp"
android:minHeight="72dp"
android:initialKeyguardLayout="@layout/widget_layout"
android:resizeMode="horizontal|vertical"
android:widgetCategory="home_screen|keyguard"
android:updatePeriodMillis="10000" >
小工具布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/player_footer_bg"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@color/purple" >
<LinearLayout
android:id="@+id/song_name_ll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="4dip" >
<ImageView
android:id="@+id/albumCover"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginRight="4dp"
android:layout_weight="1"
android:src="@drawable/list_image" />
<LinearLayout
android:id="@+id/songDetails_ll"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2"
android:orientation="vertical" >
<TextView
android:id="@+id/songName"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="3"
android:gravity="center"
android:text="@string/player_not_active"
android:textColor="@android:color/background_light"
android:textSize="@dimen/sub_text_size" />
<TextView
android:id="@+id/album_name"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1.1"
android:gravity="center"
android:textColor="@color/back_main"
android:textSize="@dimen/indicator_text_small" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/btns"
android:layout_width="match_parent"
android:layout_height="@dimen/alert_button_height"
android:layout_alignParentLeft="true"
android:layout_below="@+id/song_name_ll"
android:background="@android:color/background_dark"
android:orientation="horizontal" >
<ImageButton
android:id="@+id/btnRepeat"
android:layout_width="0dp"
android:layout_height="@dimen/alert_button_height"
android:layout_margin="@dimen/nav_drawer_header_divider_height"
android:layout_weight="1"
android:background="@null"
android:padding="@dimen/row_marging"
android:scaleType="fitCenter"
android:src="@drawable/btn_repeat" />
<ImageView
android:id="@+id/btnPrevious"
android:layout_width="0dp"
android:layout_height="@dimen/alert_button_height"
android:layout_margin="@dimen/nav_drawer_header_divider_height"
android:layout_weight="1"
android:background="@null"
android:scaleType="fitCenter"
android:src="@drawable/btn_previous" />
<ImageView
android:id="@+id/btnPlay"
android:layout_width="0dp"
android:layout_height="@dimen/alert_button_height"
android:layout_margin="@dimen/nav_drawer_header_divider_height"
android:layout_weight="1"
android:background="@null"
android:scaleType="fitCenter"
android:src="@drawable/btn_play" />
<ImageView
android:id="@+id/btnNext"
android:layout_width="0dp"
android:layout_height="@dimen/alert_button_height"
android:layout_margin="@dimen/nav_drawer_header_divider_height"
android:layout_weight="1"
android:background="@null"
android:scaleType="fitCenter"
android:src="@drawable/btn_next" />
<ImageView
android:id="@+id/btnShuffle"
android:layout_width="0dp"
android:layout_height="@dimen/alert_button_height"
android:layout_margin="@dimen/nav_drawer_header_divider_height"
android:layout_weight="1"
android:background="@null"
android:padding="@dimen/row_marging"
android:scaleType="fitCenter"
android:src="@drawable/btn_shuffle" />
<TextView
android:id="@+id/bypass"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="@string/bypass_432"
android:textColor="@android:color/background_light"
android:textSize="@dimen/indicator_text_small" />
</LinearLayout>
正如我所提到的，代码和小部件本身运行完美！ 它根本不会在锁屏上显示。