我已经实现了后台服务来监听系统范围内的剪贴板事件..
服务实施:
public class ClipService extends Service {
ClipboardManager cm;
@Override
public void onCreate() {
Log.d("FRAG","onCreate called...");
super.onCreate();
cm = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
cm.addPrimaryClipChangedListener(new ClipboardListener());
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
super.onDestroy();
cm.removePrimaryClipChangedListener(new ClipboardListener());
}
class ClipboardListener implements ClipboardManager.OnPrimaryClipChangedListener{
@Override
public void onPrimaryClipChanged() {
Log.d("FRAG","onPrimaryClipChanged called..");
if(cm!=null) {
String s1 = cm.getPrimaryClip().getItemAt(0).coerceToText(ClipService.this).toString();
ContentValues cv = new ContentValues();
cv.put(DatabaseHelper.CONTENT,s1);
getContentResolver().insert(DataProvider.CONTENT_URI, cv);//Insert using Content provider
}
}
}
}
现在我担心的是,对于复制到剪贴板的每个文本,都会为单个复制事件插入三个条目...即。 onPrimaryClipChanged被调用三次..
我正在使用`Log.d(“FRAG”,“onPrimaryClipChanged called ..”);并且它被记录了3次,所以问题似乎是每个剪贴板更改事件被调用3次函数而不插入部分代码。
它可能被调用3次的原因是什么?
答案 0 :(得分:1)
这是WebView / Chrome的已知问题。我通过忽略某个阈值(例如50毫秒)内的重复事件来解决此问题
ClipboardManager.OnPrimaryClipChangedListener primaryClipChangedListener = new ClipboardManager.OnPrimaryClipChangedListener() {
private static final long THRESHOLD_MS = 50;
private long lastChangedTime = 0;
private String lastString = "";
@Override
public void onPrimaryClipChanged() {
try {
String str = clipMan.getText().toString();
// Copying text from certain places will trigger multiple events (e.g. Chrome/WebView generates 3 events)
// Ignore the duplicated events
if (System.currentTimeMillis() - lastChangedTime < THRESHOLD_MS && Objects.equals(lastString, str)) {
return;
}
lastChangedTime = System.currentTimeMillis();
lastString = str;
// Rest of the logic
...
}
}
}