今天因项目需求,让Android后台运行,在网上查找了哈资料,找到了一种比较简单的方式,不用service,模拟home键,该代码只能在启动程序中使用,其他activity会报空异常。贴上代码
//后台运行 private void mainservice(){ PackageManager pm = getPackageManager(); ResolveInfo homeInfo = pm.resolveActivity(new Intent(Intent.ACTION_MAIN) .addCategory(Intent.CATEGORY_HOME), 0); ActivityInfo ai = homeInfo.activityInfo; Intent startIntent = new Intent(Intent.ACTION_MAIN); startIntent.addCategory(Intent.CATEGORY_LAUNCHER); startIntent.setComponent(new ComponentName(ai.packageName, ai.name)); startActivitySafely(startIntent); } //后台运行 private void startActivitySafely(Intent intent){ intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); try{ startActivity(intent); }catch (ActivityNotFoundException e) { Toast.makeText(this, "未发现该activity", Toast.LENGTH_SHORT).show(); } catch (SecurityException e) { Toast.makeText(this, "SecurityException", Toast.LENGTH_SHORT).show(); } }