https://androidappsapk.co/search/googleplay/
https://www.apkmonk.com/download-app/
Android 键盘输入表情和颜文字禁用
public class EmojiExcludeFilter implements InputFilter {
@Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
boolean hasManyType = false;
int sourcelen = 0;
for (int i = start; i < end; i++) {
int type = Character.getType(source.charAt(i));
Log.e("InputFilter","text:"+source.toString()+"，"+type);
if (type == Character.SURROGATE || type == Character.OTHER_SYMBOL) {
Log.e("InputFilter","text 133");
return "";
}
sourcelen ++;
if(type!=Character.UPPERCASE_LETTER&&type!=Character.BYTES&&type!=Character.DECIMAL_DIGIT_NUMBER&&type!=Character.OTHER_LETTER&&type!=Character.SPACE_SEPARATOR){
hasManyType = true;
}
}
if("◽".equals(source.toString())||"◼".equals(source.toString())||"◻".equals(source.toString())){
Log.e("InputFilter","text:143");
return "";
}
if("〰".equals(source.toString())||"〽".equals(source.toString())||"⤵".equals(source.toString())){
Log.e("InputFilter","text:147");
return "";
}
if("⤴".equals(source.toString())||"◾".equals(source.toString())||"⤵".equals(source.toString())){
Log.e("InputFilter","text:151");
return "";
}
if(hasManyType&&sourcelen>1){//处理
Log.e("InputFilter","text:155:"+source.toString());
return "";
}
Log.e("InputFilter","text:"+source.toString()+"，"+source.toString());
return null;
}
}
表情的type是单一数值可以直接筛选；
颜文字的type是有多种类型拼接起来的：常用字符（type：2），数值（type：9），中文（5），空格以及其他特殊字符组成，并且颜文字的长度肯定大于1。如果字符长度大于1并且包含特殊字符，可以判定该次输入为颜文字。
Android 系统录制屏幕
如果依赖版本是Android Q之后的版本，系统录制屏幕的方法需要有所变动：
1、需要将onActivityResult中返回的resultcode和data传给service，然后在service中获取MediaProjcection
MediaProjection mediaProjection = ScreenRecorderCtrl.getInstance().getProjectionManager().getMediaProjection(resultcode, data)
2、Mainfest对应service中添加如下属性
android:enabled="true"
android:foregroundServiceType="mediaProjection"
3、Service中onStartCommand中需要设置通知，该方法要在MediaProjection初始化之前
/**
* 添加一个状态栏通知
*/
private void addNotification(){
NotificationManager manager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
if(Build.VERSION.SDK_INT >= 26)
{
//当sdk版本大于26
String id = "screenrecord";
String description = "143";
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel channel = new NotificationChannel(id, description, importance);
manager.createNotificationChannel(channel);
Notification notification = new Notification.Builder(this, id)
.setCategory(Notification.CATEGORY_MESSAGE)
.setSmallIcon(R.drawable.recoding)
.setContentTitle("录屏服务 ")
.setContentText("进行中")
.setAutoCancel(false)
.build();
startForeground(1,notification);
}
else
{
Notification notification = new Notification.Builder(this)
.setContentTitle("录屏服务 ")
.setContentText("进行中")
.setSmallIcon(R.drawable.recoding)
.build();
startForeground(1, notification);
}
}
4、Service启动的时候
Intent service = new Intent(this, ScreenRecorderService.class);
service.putExtra("code", resultcode);//onactivityresult返回值
service.putExtra("data", data);//onactivityresult 返回值
if (android.os.Build.VERSION.SDK_INT <=26) {
startService(service);
}else {
startForegroundService(service);
}
Android Wi-Fi连接
1、Android Q之后Wi-Fi连接要调用,如果用之前的方法无法连接对应的网络
@RequiresApi(api = Build.VERSION_CODES.Q)
public void wifiConnectAndroidQ(String ssid, String password)
{
NetworkSpecifier specifier =
new WifiNetworkSpecifier.Builder()
.setSsidPattern(new PatternMatcher(ssid, PatternMatcher.PATTERN_PREFIX))
.setWpa2Passphrase(password)
.build();
NetworkRequest request =
new NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
.setNetworkSpecifier(specifier)
.build();
ConnectivityManager connectivityManager = (ConnectivityManager)
getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(Network network) {
// do success processing here..
// Log.e("MainActivity","onavaliable:"+wifiManager.getConnectionInfo().);
}
@Override
public void onUnavailable() {
// do failure processing here..
}
};
connectivityManager.requestNetwork(request, networkCallback);
// Release the request when done.
// connectivityManager.unregisterNetworkCallback(networkCallback);
}
2、AndroidQ之后判断网络是否连接
private boolean isWifiEnable() {
ConnectivityManager cm = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
if (Build.VERSION.SDK_INT>=29) {
if (cm != null) {
NetworkCapabilities nc = cm.getNetworkCapabilities(cm.getActiveNetwork());
boolean boo = nc != null && nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) && nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED) && nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI);
Log.e("MainActivity","iswifienable:"+boo);
return boo;
} else {
Log.e("MainActivity","iswifienable:"+false);
return false;
}
} else {
boolean boo = cm != null && cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;
Log.e("MainActivity","iswifienable:"+boo);
return boo;
}
}
3、如果当前连接的Wi-Fi在系统Wi-Fi设置中取消保存，应用能接收到Wi-Fi变动，但是下面方法返回的ssid还是取消保存的Wi-Fi，
wifiInfo.getSSID()
需要再判断下下面是不是-1
wifiInfo.getNetworkId()
4、Android Q之后禁用三方应用打开和关闭Wi-Fi
Android WebView
1、web view黑屏问题：
1）硬件加速改成软件加速；2）setJavascriptEnable；3）webview布局尺寸设置为充满整个屏幕；4）如果是dialog弹窗中显示，则最好设置dialog的尺寸大小（window设置宽高）
2、字体设置问题：setTextZoom(),这个默认是100（原大小），另外在list view中嵌套的时候要注意。