一,获取系统版本号:
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PackageInfo info = this .getPackageManager().getPackageInfo( this .getPackageName(), 0 ); int versionCode=nfo.versionCode string versionName=info.versionName |
二、获取系统信息:
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String archiveFilePath= "sdcard/download/Law.apk" ; //安装包路径 PackageManager pm = getPackageManager(); PackageInfo info = pm.getPackageArchiveInfo(archiveFilePath, PackageManager.GET_ACTIVITIES); if (info != null ){ ApplicationInfo appInfo = info.applicationInfo; String appName = pm.getApplicationLabel(appInfo).toString(); String packageName = appInfo.packageName; //得到安装包名称 String version=info.versionName; //得到版本信息 Toast.makeText(test4. this , "packageName:" +packageName+ ";version:" +version, Toast.LENGTH_LONG).show(); Drawable icon = pm.getApplicationIcon(appInfo); //得到图标信息 TextView tv = (TextView)findViewById(R.id.tv); //显示图标 tv.setBackgroundDrawable(icon); |
三、获取安装路径和已安装程序列表
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( 1 )android中获取当前程序路径 getApplicationContext().getFilesDir().getAbsolutePath() ( 2 )android取已安装的程序列表 List<PackageInfo> packageInfoList = getPackageManager().getInstalledPackages( 0 |
四、获取图片、应用名、包名
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PackageManager pManager = MessageSendActivity. this .getPackageManager(); List<PackageInfo> appList = Utils.getAllApps(MessageSendActivity. this ); for ( int i= 0 ;i<appList.size();i++) { PackageInfo pinfo = appList.get(i); ShareItemInfo shareItem = new ShareItemInfo(); //set Icon shareItem.setIcon(pManager.getApplicationIcon(pinfo.applicationInfo)); |
五、解决listview上 Item上有按钮时 item本身不能点击的问题:
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1 . 在item试图上面添加代码: android:descendantFocusability= "blocksDescendants" 2 .在listview里 添加代码 android:focusable= "true" |
六、不让文本框输入中文:
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android:digits= "1234567890qwertyuiopasdfghjklzxcvbnm`-=[];,./~!@#$%^*()_+}{:?&<>" '" 这样就不会输入中文了。 |
七,获取屏幕宽高
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DisplayMetrics displayMetrics = new DisplayMetrics(); this .getWindowManager().getDefaultDisplay().getMetrics(displayMetrics); int height = displayMetrics.heightPixels; int width = displayMetrics.widthPixels; |
八 获取设备型号、SDK版本及系统版本
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String device_model = Build.MODEL; // 设备型号 String version_sdk = Build.VERSION.SDK; // 设备SDK版本 String version_release = Build.VERSION.RELEASE; // 设备的系统版本 |
九,获取应用程序下所有Activity
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public static ArrayList<String> getActivities(Context ctx) { ArrayList<String> result = new ArrayList<String>(); Intent intent = new Intent(Intent.ACTION_MAIN, null ); intent.setPackage(ctx.getPackageName()); for (ResolveInfo info : ctx.getPackageManager().queryIntentActivities(intent, 0 )) { result.add(info.activityInfo.name); } return result; } |