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
简单地使用SuperToast在任何情况下都可以做出优雅的吐司。让你的吐司颜色鲜艳。编辑你的字体颜色和大小。希望这对你来说都是一体的。
其他回答
为此,我编写了一个辅助类。你可以在github上看到代码:https://github.com/quiqueqs/Toast-Expander/blob/master/src/com/thirtymatches/toasted/ToastedActivity.java
这是你如何在5秒(或5000毫秒)内显示祝酒词:
Toast aToast = Toast.makeText(this, "Hello World", Toast.LENGTH_SHORT);
ToastExpander.showFor(aToast, 5000);
下面是我用上面的代码创建的一个自定义Toast类:
import android.content.Context;
import android.os.CountDownTimer;
import android.widget.Toast;
public class CustomToast extends Toast {
int mDuration;
boolean mShowing = false;
public CustomToast(Context context) {
super(context);
mDuration = 2;
}
/**
* Set the time to show the toast for (in seconds)
* @param seconds Seconds to display the toast
*/
@Override
public void setDuration(int seconds) {
super.setDuration(LENGTH_SHORT);
if(seconds < 2) seconds = 2; //Minimum
mDuration = seconds;
}
/**
* Show the toast for the given time
*/
@Override
public void show() {
super.show();
if(mShowing) return;
mShowing = true;
final Toast thisToast = this;
new CountDownTimer((mDuration-2)*1000, 1000)
{
public void onTick(long millisUntilFinished) {thisToast.show();}
public void onFinish() {thisToast.show(); mShowing = false;}
}.start();
}
}
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。
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);
}
}
}
用户不能自定义吐司的持续时间。因为NotificationManagerService的scheduleTimeoutLocked()函数没有使用字段duration。源代码如下。
private void scheduleTimeoutLocked(ToastRecord r, boolean immediate)
{
Message m = Message.obtain(mHandler, MESSAGE_TIMEOUT, r);
long delay = immediate ? 0 : (r.duration == Toast.LENGTH_LONG ? LONG_DELAY : SHORT_DELAY);
mHandler.removeCallbacksAndMessages(r);
mHandler.sendMessageDelayed(m, delay);
}
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