当为Toast使用setDuration()时,是否可以设置一个自定义长度或至少比Toast. length_long更长的长度?
当前回答
我已经开发了一个自定义吐司类,您可以显示吐司所需的持续时间(以毫秒计)
import android.content.Context;
import android.os.Build;
import android.os.Handler;
import android.util.Log;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;
public final class ToastHelper {
private static final String TAG = ToastHelper.class.getName();
public static interface OnShowListener {
public void onShow(ToastHelper toast);
}
public static interface OnDismissListener {
public void onDismiss(ToastHelper toast);
}
private static final int WIDTH_PADDING_IN_DIP = 25;
private static final int HEIGHT_PADDING_IN_DIP = 15;
private static final long DEFAULT_DURATION_MILLIS = 2000L;
private final Context context;
private final WindowManager windowManager;
private View toastView;
private int gravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM;
private int mX;
private int mY;
private long duration = DEFAULT_DURATION_MILLIS;
private CharSequence text = "";
private int horizontalMargin;
private int verticalMargin;
private WindowManager.LayoutParams params;
private Handler handler;
private boolean isShowing;
private boolean leadingInfinite;
private OnShowListener onShowListener;
private OnDismissListener onDismissListener;
private final Runnable timer = new Runnable() {
@Override
public void run() {
cancel();
}
};
public ToastHelper(Context context) {
Context mContext = context.getApplicationContext();
if (mContext == null) {
mContext = context;
}
this.context = mContext;
windowManager = (WindowManager) mContext
.getSystemService(Context.WINDOW_SERVICE);
init();
}
private void init() {
mY = context.getResources().getDisplayMetrics().widthPixels / 5;
params = new WindowManager.LayoutParams();
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
params.format = android.graphics.PixelFormat.TRANSLUCENT;
params.type = WindowManager.LayoutParams.TYPE_TOAST;
params.setTitle("ToastHelper");
params.alpha = 1.0f;
// params.buttonBrightness = 1.0f;
params.packageName = context.getPackageName();
params.windowAnimations = android.R.style.Animation_Toast;
}
@SuppressWarnings("deprecation")
@android.annotation.TargetApi(Build.VERSION_CODES.JELLY_BEAN)
private View getDefaultToastView() {
TextView textView = new TextView(context);
textView.setText(text);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.START);
textView.setClickable(false);
textView.setFocusable(false);
textView.setFocusableInTouchMode(false);
textView.setTextColor(android.graphics.Color.WHITE);
// textView.setBackgroundColor(Color.BLACK);
android.graphics.drawable.Drawable drawable = context.getResources()
.getDrawable(android.R.drawable.toast_frame);
if (Build.VERSION.SDK_INT < 16) {
textView.setBackgroundDrawable(drawable);
} else {
textView.setBackground(drawable);
}
int wP = getPixFromDip(context, WIDTH_PADDING_IN_DIP);
int hP = getPixFromDip(context, HEIGHT_PADDING_IN_DIP);
textView.setPadding(wP, hP, wP, hP);
return textView;
}
private static int getPixFromDip(Context context, int dip) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
dip, context.getResources().getDisplayMetrics());
}
public void cancel() {
removeView(true);
}
private void removeView(boolean invokeListener) {
if (toastView != null && toastView.getParent() != null) {
try {
Log.i(TAG, "Cancelling Toast...");
windowManager.removeView(toastView);
handler.removeCallbacks(timer);
} finally {
isShowing = false;
if (onDismissListener != null && invokeListener) {
onDismissListener.onDismiss(this);
}
}
}
}
public void show() {
if (leadingInfinite) {
throw new InfiniteLoopException(
"Calling show() in OnShowListener leads to infinite loop.");
}
cancel();
if (onShowListener != null) {
leadingInfinite = true;
onShowListener.onShow(this);
leadingInfinite = false;
}
if (toastView == null) {
toastView = getDefaultToastView();
}
params.gravity = android.support.v4.view.GravityCompat
.getAbsoluteGravity(gravity, android.support.v4.view.ViewCompat
.getLayoutDirection(toastView));
if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.FILL_HORIZONTAL) {
params.horizontalWeight = 1.0f;
}
if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.FILL_VERTICAL) {
params.verticalWeight = 1.0f;
}
params.x = mX;
params.y = mY;
params.verticalMargin = verticalMargin;
params.horizontalMargin = horizontalMargin;
removeView(false);
windowManager.addView(toastView, params);
isShowing = true;
if (handler == null) {
handler = new Handler();
}
handler.postDelayed(timer, duration);
}
public boolean isShowing() {
return isShowing;
}
public void setDuration(long durationMillis) {
this.duration = durationMillis;
}
public void setView(View view) {
removeView(false);
toastView = view;
}
public void setText(CharSequence text) {
this.text = text;
}
public void setText(int resId) {
text = context.getString(resId);
}
public void setGravity(int gravity, int xOffset, int yOffset) {
this.gravity = gravity;
mX = xOffset;
mY = yOffset;
}
public void setMargin(int horizontalMargin, int verticalMargin) {
this.horizontalMargin = horizontalMargin;
this.verticalMargin = verticalMargin;
}
public long getDuration() {
return duration;
}
public int getGravity() {
return gravity;
}
public int getHorizontalMargin() {
return horizontalMargin;
}
public int getVerticalMargin() {
return verticalMargin;
}
public int getXOffset() {
return mX;
}
public int getYOffset() {
return mY;
}
public View getView() {
return toastView;
}
public void setOnShowListener(OnShowListener onShowListener) {
this.onShowListener = onShowListener;
}
public void setOnDismissListener(OnDismissListener onDismissListener) {
this.onDismissListener = onDismissListener;
}
public static ToastHelper makeText(Context context, CharSequence text,
long durationMillis) {
ToastHelper helper = new ToastHelper(context);
helper.setText(text);
helper.setDuration(durationMillis);
return helper;
}
public static ToastHelper makeText(Context context, int resId,
long durationMillis) {
String string = context.getString(resId);
return makeText(context, string, durationMillis);
}
public static ToastHelper makeText(Context context, CharSequence text) {
return makeText(context, text, DEFAULT_DURATION_MILLIS);
}
public static ToastHelper makeText(Context context, int resId) {
return makeText(context, resId, DEFAULT_DURATION_MILLIS);
}
public static void showToast(Context context, CharSequence text) {
makeText(context, text, DEFAULT_DURATION_MILLIS).show();
}
public static void showToast(Context context, int resId) {
makeText(context, resId, DEFAULT_DURATION_MILLIS).show();
}
private static class InfiniteLoopException extends RuntimeException {
private static final long serialVersionUID = 6176352792639864360L;
private InfiniteLoopException(String msg) {
super(msg);
}
}
}
其他回答
为什么要吃吐司,当你可以拥有整个Snackbar: https://developer.android.com/reference/android/support/design/widget/Snackbar.html
小吃店>吐司,定制吐司,油炸面包丁
private Toast mToastToShow;
public void showToast(View view) {
// Set the toast and duration
int toastDurationInMilliSeconds = 10000;
mToastToShow = Toast.makeText(this, "Hello world, I am a toast.", Toast.LENGTH_LONG);
// Set the countdown to display the toast
CountDownTimer toastCountDown;
toastCountDown = new CountDownTimer(toastDurationInMilliSeconds, 1000 /*Tick duration*/) {
public void onTick(long millisUntilFinished) {
mToastToShow.show();
}
public void onFinish() {
mToastToShow.cancel();
}
};
// Show the toast and starts the countdown
mToastToShow.show();
toastCountDown.start();
}
在所有可用的解决方案都失败后,我最终使用递归解决了问题。
代码:
//Recursive function, pass duration in seconds
public void showToast(int duration) {
if (duration <= 0)
return;
Toast.makeText(this, "Hello, it's a toast", Toast.LENGTH_LONG).show();
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
showToast(duration-1);
}
}, 1000);
}
正如其他人提到的,Android toast可以是LENGTH_LONG或LENGTH_SHORT。这是没有办法的,你也不应该遵循发布的任何“技巧”。
toast的目的是显示“非必要的”信息,由于它们的持久影响,如果消息的持续时间超过一定的阈值,消息可能会脱离上下文。如果股票吐司被修改,使它们可以显示比LENGTH_LONG更长的时间,消息将在屏幕上停留,直到应用程序的进程终止,因为吐司视图被添加到WindowManager,而不是应用程序中的ViewGroup。我认为这就是硬编码的原因。
如果您确实需要显示toast样式的消息超过3.5秒,我建议构建一个附加到Activity内容的视图,这样当用户退出应用程序时,它就会消失。我的SuperToasts库处理这个问题和许多其他问题,请随意使用它!您很可能对使用SuperActivityToasts感兴趣
Toast.makeText(this, "Text", Toast.LENGTH_LONG).show();
Toast.makeText(this, "Text", Toast.LENGTH_LONG).show();
这个问题的解决方法很简单。两到三倍就能让吐司保鲜得更久。这是唯一的办法。
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