// Param is optional, to run task on UI thread.
Handler handler = new Handler(Looper.getMainLooper());
Runnable runnable = new Runnable() {
@Override
public void run() {
// Do the task...
handler.postDelayed(this, milliseconds) // Optional, to repeat the task.
}
};
handler.postDelayed(runnable, milliseconds);
// Stop a repeating task like this.
handler.removeCallbacks(runnable);
new android.os.Handler(Looper.getMainLooper()).postDelayed(
new Runnable() {
public void run() {
Log.i("tag", "This'll run 300 milliseconds later");
}
},
300);
这就相当于
setTimeout(
function() {
console.log("This will run 300 milliseconds later");
},
300);
setTimeout(function(){
// something that can be run.
}, 1500);
Kotlin: runOnTimeout ()
inline fun runOnTimeout(crossinline block: () -> Unit, timeoutMillis: Long) {
Handler(Looper.getMainLooper()).postDelayed({
block()
}, timeoutMillis)
}
呼叫
runOnTimeout({
// something that can be run.
}, 1500)
等效时间间隔
Javascript: setInterval ()
setInterval(function(){
// something that can be run.
}, 1500);
Kotlin: runOnInterval ()
inline fun runOnInterval(crossinline block: () -> Unit, interval: Long) {
val runnable = object : Runnable {
override fun run() {
block()
handler.postDelayed(this, interval)
}
}
handler.post(runnable)
}
呼叫
runOnInterval({
// something that can be run.
}, 1500)
可取消的超时和间隔
如果要使用自定义处理程序以取消可运行文件,则可以使用以下代码。
暂停
inline fun runOnTimeout(crossinline block: () -> Unit, timeoutMillis: Long) {
runOnTimeout(Handler(Looper.getMainLooper()), block, timeoutMillis)
}
inline fun runOnTimeout(handler: Handler, crossinline block: () -> Unit, timeoutMillis: Long): Runnable {
val runnable = Runnable { block() }
handler.postDelayed(runnable, timeoutMillis)
return runnable
}
暂停: 呼叫
runOnTimeout({
// something that can be run.
}, 1500)
// OR
val runnable = runOnTimeout(mHandler, {
// something that can be run.
}, 1500)
// to cancel
mHandler.removeCallbacks(runnable)
间隔
inline fun runOnInterval(crossinline block: () -> Unit, interval: Long) {
runOnInterval(Handler(Looper.getMainLooper()), block, interval)
}
inline fun runOnInterval(handler: Handler, crossinline block: () -> Unit, interval: Long): Runnable {
val runnable = object : Runnable {
override fun run() {
block()
handler.postDelayed(this, interval)
}
}
handler.post(runnable)
return runnable
}
呼叫
runOnInterval({
// something that can be run.
}, 1500)
// OR
val runnable = runOnInterval(mHandler, {
// something that can be run.
}, 1500)
// to cancel
mHandler.removeCallbacks(runnable)