Android系统小知识
1、launcher的布局太居中，要想两边拉伸
<\packages\apps\Launcher2\res\values\dimens.xml>
apps tab栏的宽度（ Launcher2 icon 数目、大小）
\packages\apps\Launcher2\res\layout-sw720dp\workspace.xml>
launcher:cellCountX="10"
launcher:cellCountY="6"
2、或者不想改数目：
<\packages\apps\Launcher2\src\com\android\launcher2\AppsCustomizeTabHost.java>
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
mTabs.getLayoutParams().width = contentWidth + 108;
3、workspace、AppsCustomize的cell大小：
<\packages\apps\Launcher2\res\values-sw600dp\dimens.xml>
4、里面icon的大小：
<\packages\apps\Launcher2\res\values-sw600dp\dimens.xml>
5、workspace没有拖动，第二页第一个icon出现在第一页的最右边：
加大workspace的宽度，或间距：
workspace的paddingLeft、paddingRight：
<\packages\apps\Launcher2\res\values-sw600dp-land\dimens.xml>
workspace两屏间距：
修改workspace的字体大小：
如果没有就添加：
<\packages\apps\Launcher2\res\values-sw480dp\styles.xml>
6、加wallpaper：
1.<\packages\apps\Launcher2\res\values-sw600dp\wallpapers.xml>
加wallpaper的名字
2.<\packages\apps\Launcher2\res\drawable-nodpi>
加如wallpaper
7、gallery的widget默认添加到workspace上：
<\packages\apps\Launcher2\res\xml\default_workspace.xml>
launcher:className="com.android.gallery3d.gadget.PhotoAppWidgetProvider"
launcher:screen="2"
launcher:x="1"
launcher:y="0"
launcher:spanX="3"
launcher:spanY="3" />
<\packages\apps\Gallery2\src\com\android\gallery3d\gadget\PhotoAppWidgetProvider.java>
@Override
public void onUpdate(Context context,
for (int id : appWidgetIds) {
if(id == 2){
helper.setWidget(id,WidgetDatabaseHelper.TYPE_SHUFFLE, null);
}
}
8、在桌面上添加网页的快捷方式：
<\packages\apps\Launcher2\res\xml\default_workspace.xml>
launcher:icon="@drawable/ic_no_applications"
launcher:uri="http://www.aaa.com"
launcher:screen="0"
launcher:x="0"
launcher:y="3" />
9、在桌面上默认放文件夹：
<\packages\apps\Launcher2\res\xml\default_workspace.xml>
launcher:x="2"
launcher:y="2"
launcher:title = "@string/application_name" >
launcher:packageName="com.android.deskclock"
launcher:container="1"
launcher:x="0"
launcher:y="0" />
launcher:packageName="com.android.calculator2"
launcher:container="1"
launcher:x="0"
launcher:y="0" />
10、桌面上添加快捷方式，点击播放视频：
<\packages\apps\Launcher2\res\xml-sw720dp\default_workspace.xml>
launcher:uri="file:///mnt/sdcard/external_sdcard/1...playermenu;end"
launcher:screen="2"
launcher:x="1"
launcher:y="1" />
11、安装apk，显示隐藏的google play：
1.写google显示的apk:
GooglePlayShow的activity：
ComponentName componentname = new ComponentName("com.android.vending", "com.android.vending.AssetBrowserActivity");
packagemanager.setComponentEnabledSetting(componentname, 1, 1);
componentname = new ComponentName("com.example.googleplayshow", "com.example.googleplayshow.MainActivity");
packagemanager.setComponentEnabledSetting(componentname, 2, 1);
2.<\packages\apps\Launcher2\src\com\android\launcher2\LauncherModel.java>
} else if (Intent.ACTION_PACKAGE_ADDED.equals(action)) {
if (!replacing) {
if(packageName.equals("com.example.googleplayshow")){
context.startActivity(new Intent().setComponent(new ComponentName("com.example.googleplayshow", "com.example.googleplayshow.MainActivity")).setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
}
op = PackageUpdatedTask.OP_ADD;
} else {
op = PackageUpdatedTask.OP_UPDATE;
}
}
隐藏google search：
<\packages\apps\Launcher2\src\com\android\launcher2\Launcher.java>
private void setupViews() {
mSearchDropTargetBar = (SearchDropTargetBar) mDragLayer.findViewById(R.id.qsb_bar);
mSearchDropTargetBar.hideSearchBar(false);
void showWorkspace(boolean animated, Runnable onCompleteRunnable) {
//mSearchDropTargetBar.showSearchBar(wasInSpringLoadedMode);
12、widget中隐藏google play：
<\packages\apps\Launcher2\src\com\android\launcher2\AppsCustomizePagedView.java>
updatePackages里面添加：
if(!widget.provider.getPackageName().equals("com.android.vending") && !widget.provider.getPackageName().equals("com.android.vending.MarketWidgetProvider")){
mWidgets.add(widget);
}
13、clock的widget下部分显示不全，向上调
<\packages\amlogic\Launcher2\res\values\dimens.xml>
修改widget的text的size：
<\packages\amlogic\Launcher2\res\layout\apps_customize_widget.xml>
android:textSize="20sp" />
14、launcher中隐藏一个app：
需要该app的packageName，例如要隐藏settings：
<\packages\apps\Launcher2\src\com\android\launcher2\LauncherModel.java>
private void loadAllAppsByBatch() {
apps = packageManager.queryIntentActivities(mainIntent, 0);
ResolveInfo removeApp = null;
for(ResolveInfo info:apps){
if(info.activityInfo.packageName.equals("com.android.settings")){
removeApp = info;
}
}
if(removeApp != null){
apps.remove(removeApp);
}
15、launcher中隐藏多个app： 红色为改动部分
<\packages\apps\Launcher2\src\com\android\launcher2\LauncherModel.java>
private void loadAllAppsByBatch() {
final PackageManager packageManager = mContext.getPackageManager();
List
List
int N = Integer.MAX_VALUE;
int startIndex;
int i=0;
int batchSize = -1;
while (i < N && !mStopped) {
if (i == 0) {
mAllAppsList.clear();
final long qiaTime = DEBUG_LOADERS ? SystemClock.uptimeMillis() : 0;
allApps = packageManager.queryIntentActivities(mainIntent, 0);
for(ResolveInfo info : allApps){
if(info.activityInfo != null
&& !info.activityInfo.packageName.equalsIgnoreCase("com.android.email")
&& !info.activityInfo.packageName.equalsIgnoreCase("com.android.providers.downloads.ui")
&& !info.activityInfo.packageName.equalsIgnoreCase("com.adobe.flashplayer")){
apps.add(info);
}
}
settings 问题总结:
1.入口，设置分屏显示
frameworks\base\core\res\res\values\bools.xml 下的 preferences_prefer_dual_pane 为true.
2.top level headers--这里可以去掉左边的headers
private void updateHeaderList(List
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)) {
target.remove(header);
}
3.默认字体：
public void readFontSizePreference(ListPreference pref) {
ActivityManagerNative.getDefault().getConfiguration()
系统的Configuration是从ActivityManagerService设置的：
<\frameworks\base\services\java\com\android\server\am\ActivityManagerService.java>
mConfiguration.setToDefaults();
fontScale = Float.parseFloat(SystemProperties.get("ro.fontScale","1"));
4.settings的theme:
<\packages\apps\Settings\AndroidManifest.xml>
android:taskAffinity=""
android:theme="@android :style/Theme.Holo"
android:uiOptions="splitActionBarWhenNarrow"
android:hardwareAccelerated="true">
<\frameworks\base\core\res\res\values\themes.xml>