在Launcher3中增加主题切换功能

转自：http://blog.csdn.net/xuxinyl/article/details/26223959

说明，在SD卡中放入theme_thumbs文件夹，里面存放主题风格的缩略图，然后在theme文件下存放主题的资源文件，例如/theme/sport等等，里面图标命名规则是主题KEY_

加上快捷方式的类名（下划线取代点），例如sport_com_android_browser_BrowserActivity.png，这样就可以自动扫描加载主题风格了。

1 \packages\apps\Launcher3\res\layout\theme_picker.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent" >

<GridView

xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/gridview"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:columnWidth="280dp"

android:numColumns="auto_fit"

android:horizontalSpacing="10dp"

android:verticalSpacing="10dp"

android:stretchMode="columnWidth"

android:gravity="center">

</GridView>

</LinearLayout>

2 packages\apps\Launcher3\src\com\android\launcher3\ThemePickerActivity.java

package com.android.launcher3;

import android.app.Activity;

import java.util.ArrayList;

import java.util.List;

import android.content.Context;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.TextView;

import java.io.File;

import android.graphics.Bitmap;

import android.view.View;

import android.view.ViewGroup;

import android.widget.GridView;

import android.widget.AdapterView.OnItemClickListener;

import android.os.Bundle;

import android.widget.AdapterView;

import android.app.WallpaperManager;

import android.graphics.BitmapFactory;

public class ThemePickerActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.theme_picker);

getThemeBitmaps("mnt/sdcard/theme_thumbs");

GridView gridView=(GridView)findViewById(R.id.gridview);

gridView.setAdapter(new ImageAdapter(this));

gridView.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view,

int position, long id) {

System.out.println("mThemesNames.size() -- " + mThemesNames.size());

WallpaperManager wallpaperManager = WallpaperManager.getInstance(ThemePickerActivity.this);

if(position == mThemesNames.size()) {

getSharedPreferences(LauncherAppState.getSharedPreferencesKey(),

Context.MODE_PRIVATE).edit().putString("theme_key","default").commit();

try{

wallpaperManager.setResource(android.content.res.Resources.getSystem().getIdentifier("default_wallpaper", "drawable", "android"));

}catch (Exception e){

e.printStackTrace();

}

android.os.Process.killProcess(android.os.Process.myPid());

}

else if( isFileEffect("mnt/sdcard/theme/"+mThemesNames.get(position)) ){

getSharedPreferences(LauncherAppState.getSharedPreferencesKey(),

Context.MODE_PRIVATE).edit().putString("theme_key",mThemesNames.get(position)).commit();

try{

wallpaperManager.setBitmap(BitmapFactory.decodeFile("mnt/sdcard/theme/"+mThemesNames.get(position)+"/"+mThemesNames.get(position)+"_wallpaper.jpg" ));

}catch (Exception e){

e.printStackTrace();

}

android.os.Process.killProcess(android.os.Process.myPid());

}else{

//down load this theme

}

}

});

}

private List<String> mThemesNames = null;

private List<Bitmap> mThemesBitmaps = null;

private class ImageAdapter extends BaseAdapter{

private Context mContext;

public ImageAdapter(Context context) {

this.mContext=context;

}

@Override

public int getCount() {

return mThemesNames.size()+1;

}

@Override

public Object getItem(int position) {

if(position == mThemesNames.size())

return BitmapFactory. decodeResource (ThemePickerActivity.this.getResources(), R.drawable.default_scene);

else

return mThemesBitmaps.get(position);

}

@Override

public long getItemId(int position) {

return 0;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

ImageView imageView;

if(convertView==null){

imageView=new ImageView(mContext);

imageView.setLayoutParams(new GridView.LayoutParams(280, 478));

imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

imageView.setPadding(8, 8, 8, 8);

}else{

imageView = (ImageView) convertView;

}

if(position == mThemesNames.size())

imageView.setImageBitmap(BitmapFactory. decodeResource (ThemePickerActivity.this.getResources(), R.drawable.default_scene));

else

imageView.setImageBitmap(mThemesBitmaps.get(position));

return imageView;

}

}

private void getThemeBitmaps(String path){

mThemesNames = new ArrayList<String>();

mThemesBitmaps = new ArrayList<Bitmap>();

List<String> themetitles = new ArrayList<String>();

File pathFile = new File(path);

if(pathFile.exists() && pathFile.isDirectory()){

String[] fileNames = pathFile.list();

if(fileNames.length <= 0)

return;

for(String filename:fileNames){

File subFile = new File(path+"/"+filename);

if(subFile.exists() && (!subFile.isDirectory()) && subFile.getName().endsWith(".png")){

Bitmap bitmap = android.graphics.BitmapFactory.decodeFile(path+"/"+filename);

String namekey = trimExtension(filename);

if(bitmap !=null && (namekey != null) ){

mThemesNames.add(namekey);

mThemesBitmaps.add(bitmap);

}

}

}

}

}

private String trimExtension(String filename)

{

if ((filename != null) && (filename.length() > 0)) {

int i = filename.lastIndexOf('.');

if ((i >-1) && (i < (filename.length()))) {

return filename.substring(0, i);

}

}

return null;

}

private boolean isFileEffect(String name){

File file = new File(name);

if(file.exists() && file.isDirectory() && (file.list().length > 0) )

return true;

else

return false;

}

}

3 /packages/apps/Launcher3/src/com/android/launcher3/Hotseat.java

public Hotseat(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

Resources r = context.getResources();

/*

Drawable d = null;

String themeKeyname = context.getSharedPreferences(LauncherAppState.getSharedPreferencesKey(),

Context.MODE_PRIVATE).getString("theme_key","default");

if (!themeKeyname.equals("default")) {

String workbgpath = "mnt/sdcard/theme/" + themeKeyname +"/"

+ themeKeyname + "_workspace_bg.png";

if(new File(workbgpath).exists()){

d = new android.graphics.drawable.BitmapDrawable( BitmapFactory.decodeFile(workbgpath) );

}

}

if(d!=null)

setBackgroundDrawable(d);

*/

mTransposeLayoutWithOrientation =

r.getBoolean(R.bool.hotseat_transpose_layout_with_orientation);

mIsLandscape = context.getResources().getConfiguration().orientation ==

Configuration.ORIENTATION_LANDSCAPE;

}

void resetLayout() {

mContent.removeAllViewsInLayout();

if (!AppsCustomizePagedView.DISABLE_ALL_APPS) {

// Add the Apps button

Context context = getContext();

LayoutInflater inflater = LayoutInflater.from(context);

TextView allAppsButton = (TextView)

inflater.inflate(R.layout.all_apps_button, mContent, false);

//add by xuxin

Drawable d;

String themeKeyname = context.getSharedPreferences(LauncherAppState.getSharedPreferencesKey(),

Context.MODE_PRIVATE).getString("theme_key","default");

//android.os.SystemProperties.get("persist.sys.theme.key", "default");

if (!themeKeyname.equals("default")) {

String iconpath = "mnt/sdcard/theme/" + themeKeyname +"/"

+ themeKeyname + "_all_apps.png";

if(new File(iconpath).exists()){

d = new FastBitmapDrawable(BitmapFactory.decodeFile(iconpath));

}else{

d = context.getResources().getDrawable(R.drawable.all_apps_button_icon);

}

}else{

// add by xuxin

d = context.getResources().getDrawable(R.drawable.all_apps_button_icon);

}

Utilities.resizeIconDrawable(d);

allAppsButton.setCompoundDrawables(null, d, null, null);

allAppsButton.setContentDescription(context.getString(R.string.all_apps_button_label));

if (mLauncher != null) {

allAppsButton.setOnTouchListener(mLauncher.getHapticFeedbackTouchListener());

}

allAppsButton.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(android.view.View v) {

Trace.traceBegin(Trace.TRACE_TAG_INPUT, "onClick");

if (LauncherLog.DEBUG) {

LauncherLog.d(TAG, "Click on all apps view on hotseat: mLauncher = " + mLauncher);

}

if (mLauncher != null) {

mLauncher.onClickAllAppsButton(v);

}

Trace.traceEnd(Trace.TRACE_TAG_INPUT);

}

});

// Note: We do this to ensure that the hotseat is always laid out in the orientation of

// the hotseat in order regardless of which orientation they were added

int x = getCellXFromOrder(mAllAppsButtonRank);

int y = getCellYFromOrder(mAllAppsButtonRank);

CellLayout.LayoutParams lp = new CellLayout.LayoutParams(x,y,1,1);

lp.canReorder = false;

mContent.addViewToCellLayout(allAppsButton, -1, 0, lp, true);

}

}

4 packages\apps\Launcher3\src\com\android\launcher3\IconCache.java

mSharedPrefs = context.getSharedPreferences(LauncherAppState.getSharedPreferencesKey(),

Context.MODE_PRIVATE);

public Drawable getFullResIcon(Resources resources, int iconId) {

Drawable d;

try {

d = resources.getDrawableForDensity(iconId, mIconDpi);

Bitmap b = addThemeLogo(((BitmapDrawable)d).getBitmap());

d = new FastBitmapDrawable (b);

} catch (Resources.NotFoundException e) {

d = null;

}

return (d != null) ? d : getFullResDefaultActivityIcon();

}

public Drawable getFullResIcon(String packageName, int iconId) {

//add by xuxin

String themeKeyname = mSharedPrefs.getString("theme_key","default");

//android.os.SystemProperties.get("persist.sys.theme.key", "default");

if (!themeKeyname.equals("default")) {

String iconpath = "mnt/sdcard/theme/" + themeKeyname +"/"

+ themeKeyname + "_" + convertToIconResName(packageName)+".png";

if(new File(iconpath).exists()){

return new FastBitmapDrawable(BitmapFactory.decodeFile(iconpath));

}

}

// add by xuxin

}

public Drawable getFullResIcon(ActivityInfo info) {

//add by xuxin

String themeKeyname = mSharedPrefs.getString("theme_key","default");//android.os.SystemProperties.get("persist.sys.theme.key", "default");

String iconpath;

if (!themeKeyname.equals("default")) {

iconpath = "mnt/sdcard/theme/" + themeKeyname +"/"

+ themeKeyname + "_" + convertToIconResName(info.name)+".png";

if(new File(iconpath).exists()){

return new FastBitmapDrawable(BitmapFactory.decodeFile(iconpath));

}else{

iconpath = "mnt/sdcard/theme/" + themeKeyname +"/"

+ themeKeyname + "_" + convertToIconResName(info.packageName)+".png";

if(new File(iconpath).exists()){

return new FastBitmapDrawable(BitmapFactory.decodeFile(iconpath));

}

}

}

//add by xuxin

}

private CacheEntry cacheLocked(ComponentName componentName, ResolveInfo info,

HashMap<Object, CharSequence> labelCache) {

//add by xuxin

String themeKeyname = mSharedPrefs.getString("theme_key","default");//android.os.SystemProperties.get("persist.sys.theme.key", "default");

System.out.println("get key --- " + themeKeyname);

String iconpath;

if (!themeKeyname.equals("default")) {

iconpath = "mnt/sdcard/theme/" + themeKeyname +"/"

+ themeKeyname + "_" + convertToIconResName(info.activityInfo.name)+".png";

if(new File(iconpath).exists()){

entry.icon = BitmapFactory.decodeFile(iconpath);

}else{

iconpath = "mnt/sdcard/theme/" + themeKeyname +"/"

+ themeKeyname + "_" + convertToIconResName(info.activityInfo.packageName)+".png";

if(new File(iconpath).exists()){

entry.icon = BitmapFactory.decodeFile(iconpath);

}else{

entry.icon = Utilities.createIconBitmap(

getFullResIcon(info), mContext);

}

}

}else{

entry.icon = Utilities.createIconBitmap(

getFullResIcon(info), mContext);

}

//add by xuxin

}

private String convertToIconResName(String input) {

return input != null && !input.equals("") ? input.replace('.', '_').toLowerCase() : input;

}

private Bitmap addThemeLogo(Bitmap srcBitmap){

String themeKeyname = mSharedPrefs.getString("theme_key","default");//android.os.SystemProperties.get("persist.sys.theme.key", "default");

Bitmap b2 = BitmapFactory.decodeFile("mnt/sdcard/theme/"+themeKeyname +"/"+themeKeyname+"_icon_bg.png");

if (themeKeyname.equals("default") || b2 == null) {

return srcBitmap;

}

Bitmap b3 = Bitmap.createBitmap(srcBitmap.getWidth()+5, srcBitmap.getHeight()+5, srcBitmap.getConfig());

Canvas canvas = new Canvas(b3);

canvas.drawBitmap(srcBitmap,0,0,new Paint(Paint.FILTER_BITMAP_FLAG));

canvas.drawBitmap(b2,0,Math.abs(srcBitmap.getHeight()-b2.getHeight()),new Paint(Paint.FILTER_BITMAP_FLAG));

return b3;

}

5 packages/apps/Launcher3/AndroidManifest.xml

<activity

android:name="com.android.launcher3.ThemePickerActivity"

android:icon="@drawable/theme_icon"

android:launchMode="singleTask"

android:clearTaskOnLaunch="true">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.DEFAULT" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>