版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/mattdong0106/article/details/44020619
1.判断应用是否在运行
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningTaskInfo> list = am.getRunningTasks(100);
for (RunningTaskInfo info : list) {
if (info.topActivity.getPackageName().equals(MY_PKG_NAME) && info.baseActivity.getPackageName().equals(MY_PKG_NAME)) {
isAppRunning = true;
break;
} else {
isAppRunning = false;
}
}
需要权限:
<uses-permission android:name="android.permission.GET_TASKS" />
2.启动一个APP
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
ComponentName cn = new ComponentName(packageName, className);
intent.setComponent(cn);
startActivity(intent);
3.Monkey测试
详细的monkey介绍,和options的参数请查看 (http://developer.android.com/guide/developing/tools/monkey.html)
命令行示例,它启动指定的应用程序,并向其发送500个伪随机事件:
adb shell monkey -p your.package.name -vvv 500 > monkeytest.txt
-p表示对象包 -v 为 verbose的缩写(信息级别就是日志的详细程度),就是详细输出事件等级,这个3个v就是输出等级1至3的所有事件.(使用管道命令将输出结果放到一个文本里面方便查看)
4.强制横竖屏
在配置文件中对Activity节点添加android:screenOrientation属性(landscape是横向,portrait是纵向)
android:screenOrientation="portrait">
5.全屏
4.0以前,在Activity的onCreate方法中的setContentView(myview)调用之前添加下面代码
requestWindowFeature(Window.FEATURE_NO_TITLE);//隐藏标题
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);//设置全屏
4.0以上版本隐藏NavigationBar
private void hideNavigation() {
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
}
6.获取当前手机号
/*
* 获取当前的手机号
*/
public String getLocalNumber() {
TelephonyManager tManager = (TelephonyManager) this
.getSystemService(TELEPHONY_SERVICE);
String number = tManager.getLine1Number();
return number;
}
7.检查是否有网络连接
public boolean checkInternet() {
ConnectivityManager cm = (ConnectivityManager) this
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
if (info != null && info.isConnected()) {
// 能连接Internet
return true;
} else {
// 不能连接到
return false;
}
}
8.计算已使用内存的百分比
/**
* 计算已使用内存的百分比,并返回。
*
* @param context
* 可传入应用程序上下文。
* @return 已使用内存的百分比,以字符串形式返回。
*/
public static String getUsedPercentValue(Context context) {
String dir = "/proc/meminfo";
try {
FileReader fr = new FileReader(dir);
BufferedReader br = new BufferedReader(fr, 2048);
String memoryLine = br.readLine();
String subMemoryLine = memoryLine.substring(memoryLine.indexOf("MemTotal:"));
br.close();
long totalMemorySize = Integer.parseInt(subMemoryLine.replaceAll("\\D+", ""));
long availableSize = getAvailableMemory(context) / 1024;
int percent = (int) ((totalMemorySize - availableSize) / (float) totalMemorySize * 100);
return percent + "%";
} catch (IOException e) {
e.printStackTrace();
}
return "null";
}
/**
* 获取当前可用内存,返回数据以字节为单位。
*
* @param context
* 可传入应用程序上下文。
* @return 当前可用内存。
*/
private static long getAvailableMemory(Context context) {
ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
getActivityManager(context).getMemoryInfo(mi);
return mi.availMem;
}
9.系统设置大号字体后避免布局错乱
@Override
protected void onResume() {
super.onResume();
Resources resource = getResources();
Configuration c =resource.getConfiguration();
c.fontScale = 1.0f;
resource.updateConfiguration(c, resource.getDisplayMetrics());
}
10.不让app显示在最近任务列表中:
PS:虽然不显示,但是依然可以被杀死#-_-#
android:excludeFromRecents=“true”
11.dp转px:
public static int dp2px(Context context, int dp) {
final float fDensity = context.getResources().getDisplayMetrics().density;
return (int) (dp * fDensity + 0.5f);
}
12.防止快速点击:
private long mLastClickTime;
public boolean isFastDoubleClick() {
long time = System.currentTimeMillis();
long timeD = time - mLastClickTime;
if (0 < timeD && timeD < 1000) {
return true;
}
mLastClickTime = time;
return false;
}
13.获取屏幕宽高和像素密度等:
Point point = new Point();
getWindowManager().getDefaultDisplay().getSize(point);
Log.d(TAG, "the screen size is " + point.toString());
getWindowManager().getDefaultDisplay().getRealSize(point);
Log.d(TAG,"the screen real size is "+point.toString());
DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
Log.d(TAG,"Density is "+displayMetrics.density + " densityDpi is "+displayMetrics.densityDpi+" height: "+displayMetrics.heightPixels+
" width: "+displayMetrics.widthPixels);
14.获取当前进程的名称:
public static String getProcessName(Context cxt, int pid) {
ActivityManager am = (ActivityManager) cxt.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningAppProcessInfo> runningApps = am.getRunningAppProcesses();
if (runningApps == null) {
return null;
}
for (RunningAppProcessInfo procInfo : runningApps) {
if (procInfo.pid == pid) {
return procInfo.processName;
}
}
return null;
}
15.过滤HTML标签,把HTML内容转为文本格式 :
/**
* 把html内容转为文本
* @param html 需要处理的html文本
* @param filterTags 需要保留的html标签样式
* @return
*/
public static String trimHtml2Txt(String html, String[] filterTags){
html = html.replaceAll("\\<head>[\\s\\S]*?</head>(?i)", "");//去掉head
html = html.replaceAll("\\<!--[\\s\\S]*?-->", "");//去掉注释
html = html.replaceAll("\\<![\\s\\S]*?>", "");
html = html.replaceAll("\\<style[^>]*>[\\s\\S]*?</style>(?i)", "");//去掉样式
html = html.replaceAll("\\<script[^>]*>[\\s\\S]*?</script>(?i)", "");//去掉js
html = html.replaceAll("\\<w:[^>]+>[\\s\\S]*?</w:[^>]+>(?i)", "");//去掉word标签
html = html.replaceAll("\\<xml>[\\s\\S]*?</xml>(?i)", "");
html = html.replaceAll("\\<html[^>]*>|<body[^>]*>|</html>|</body>(?i)", "");
html = html.replaceAll("\\\r\n|\n|\r", " ");//去掉换行
html = html.replaceAll("\\<br[^>]*>(?i)", "\n");
List<String> tags = new ArrayList<String>();
List<String> s_tags = new ArrayList<String>();
List<String> halfTag = Arrays.asList(new String[]{"img","table","thead","th","tr","td"});//
if(filterTags != null && filterTags.length > 0){
for (String tag : filterTags) {
tags.add("<"+tag+(halfTag.contains(tag)?"":">"));//开始标签
if(!"img".equals(tag)) tags.add("</"+tag+">");//结束标签
s_tags.add("#REPLACETAG"+tag+(halfTag.contains(tag)?"":"REPLACETAG#"));//尽量替换为复杂一点的标记,以免与显示文本混合,如:文本中包含#td、#table等
if(!"img".equals(tag)) s_tags.add("#REPLACETAG/"+tag+"REPLACETAG#");
}
}
html = ExStringUtils.replaceEach(html, tags.toArray(new String[tags.size()]), s_tags.toArray(new String[s_tags.size()]));
html = html.replaceAll("\\</p>(?i)", "\n");
html = html.replaceAll("\\<[^>]+>", "");
html = ExStringUtils.replaceEach(html,s_tags.toArray(new String[s_tags.size()]),tags.toArray(new String[tags.size()]));
html = html.replaceAll("\\ ", " ");
return html.trim();
}