当我使用Toast在屏幕上显示一些弹出文本时，它会将文本显示在屏幕底部上方一点的位置，这是默认位置。
现在我想把它显示在屏幕中间，或者根据我的选择显示在某个地方。
有人能指导我如何实现这个目标吗?
当前回答
//一个自定义toast类，可以显示自定义或默认toast)
public class ToastMessage {
private Context context;
private static ToastMessage instance;
/**
* @param context
*/
private ToastMessage(Context context) {
this.context = context;
}
/**
* @param context
* @return
*/
public synchronized static ToastMessage getInstance(Context context) {
if (instance == null) {
instance = new ToastMessage(context);
}
return instance;
}
/**
* @param message
*/
public void showLongMessage(String message) {
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
}
/**
* @param message
*/
public void showSmallMessage(String message) {
Toast.makeText(context, message, Toast.LENGTH_LONG).show();
}
/**
* The Toast displayed via this method will display it for short period of time
*
* @param message
*/
public void showLongCustomToast(String message) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
View layout = inflater.inflate(R.layout.layout_custom_toast, (ViewGroup) ((Activity) context).findViewById(R.id.ll_toast));
TextView msgTv = (TextView) layout.findViewById(R.id.tv_msg);
msgTv.setText(message);
Toast toast = new Toast(context);
toast.setGravity(Gravity.FILL_HORIZONTAL | Gravity.BOTTOM, 0, 0);
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(layout);
toast.show();
}
/**
* The toast displayed by this class will display it for long period of time
*
* @param message
*/
public void showSmallCustomToast(String message) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
View layout = inflater.inflate(R.layout.layout_custom_toast, (ViewGroup) ((Activity) context).findViewById(R.id.ll_toast));
TextView msgTv = (TextView) layout.findViewById(R.id.tv_msg);
msgTv.setText(message);
Toast toast = new Toast(context);
toast.setGravity(Gravity.FILL_HORIZONTAL | Gravity.BOTTOM, 0, 0);
toast.setDuration(Toast.LENGTH_SHORT);
toast.setView(layout);
toast.show();
}
}
其他回答
解决方案
fun Context.showToastOnTOP(message: String) = Toast.makeText(this, message, Toast.LENGTH_SHORT)
.apply { setGravity(Gravity.TOP, 0, 0); show() }
fun Context.showToastOnBOTTOM(message: String) = Toast.makeText(this, message, Toast.LENGTH_SHORT)
.apply { setGravity(Gravity.BOTTOM, 0, 0); show() }
重要提示:重力只有在应用程序的最大目标为29或更少时才能工作。
冷静药丸:)
您可以使用以下命令自定义Toast的位置:
setGravity(int gravity, int xOffset, int yOffset)
docs
这让你可以非常明确你想要吐司的位置。
关于xOffset和yOffset参数最有用的事情之一是，你可以使用它们来相对于某个视图放置Toast。
例如，如果你想要创建一个显示在按钮顶部的自定义Toast，你可以创建一个这样的函数:
// v is the Button view that you want the Toast to appear above
// and messageId is the id of your string resource for the message
private void displayToastAboveButton(View v, int messageId)
{
int xOffset = 0;
int yOffset = 0;
Rect gvr = new Rect();
View parent = (View) v.getParent();
int parentHeight = parent.getHeight();
if (v.getGlobalVisibleRect(gvr))
{
View root = v.getRootView();
int halfWidth = root.getRight() / 2;
int halfHeight = root.getBottom() / 2;
int parentCenterX = ((gvr.right - gvr.left) / 2) + gvr.left;
int parentCenterY = ((gvr.bottom - gvr.top) / 2) + gvr.top;
if (parentCenterY <= halfHeight)
{
yOffset = -(halfHeight - parentCenterY) - parentHeight;
}
else
{
yOffset = (parentCenterY - halfHeight) - parentHeight;
}
if (parentCenterX < halfWidth)
{
xOffset = -(halfWidth - parentCenterX);
}
if (parentCenterX >= halfWidth)
{
xOffset = parentCenterX - halfWidth;
}
}
Toast toast = Toast.makeText(getActivity(), messageId, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, xOffset, yOffset);
toast.show();
}
改变土司颜色、位置和底色的方法是:
Toast toast=Toast.makeText(getApplicationContext(),"This is advanced toast",Toast.LENGTH_LONG);
toast.setGravity(Gravity.BOTTOM | Gravity.RIGHT,0,0);
View view=toast.getView();
TextView view1=(TextView)view.findViewById(android.R.id.message);
view1.setTextColor(Color.YELLOW);
view.setBackgroundResource(R.color.colorPrimary);
toast.show();
逐行解释:https://www.youtube.com/watch?v=5bzhGd1HZOc
Toast mytoast= Toast.makeText(getApplicationContext(), "Toast Message", 1);
mytoast.setGravity(Gravity.CENTER_HORIZONTAL, 0, 0); // for center horizontal
//mytoast.setGravity(Gravity.CENTER_VERTICAL); // for center vertical
//mytoast.setGravity(Gravity.TOP); // for top
mytoast.show();
上面的代码将帮助你在屏幕中间显示吐司，或者根据你的选择，根据你的需要设置吐司的重力
注意:对于这个过程，你必须使用object of Toast
//一个自定义toast类，可以显示自定义或默认toast)
public class ToastMessage {
private Context context;
private static ToastMessage instance;
/**
* @param context
*/
private ToastMessage(Context context) {
this.context = context;
}
/**
* @param context
* @return
*/
public synchronized static ToastMessage getInstance(Context context) {
if (instance == null) {
instance = new ToastMessage(context);
}
return instance;
}
/**
* @param message
*/
public void showLongMessage(String message) {
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
}
/**
* @param message
*/
public void showSmallMessage(String message) {
Toast.makeText(context, message, Toast.LENGTH_LONG).show();
}
/**
* The Toast displayed via this method will display it for short period of time
*
* @param message
*/
public void showLongCustomToast(String message) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
View layout = inflater.inflate(R.layout.layout_custom_toast, (ViewGroup) ((Activity) context).findViewById(R.id.ll_toast));
TextView msgTv = (TextView) layout.findViewById(R.id.tv_msg);
msgTv.setText(message);
Toast toast = new Toast(context);
toast.setGravity(Gravity.FILL_HORIZONTAL | Gravity.BOTTOM, 0, 0);
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(layout);
toast.show();
}
/**
* The toast displayed by this class will display it for long period of time
*
* @param message
*/
public void showSmallCustomToast(String message) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
View layout = inflater.inflate(R.layout.layout_custom_toast, (ViewGroup) ((Activity) context).findViewById(R.id.ll_toast));
TextView msgTv = (TextView) layout.findViewById(R.id.tv_msg);
msgTv.setText(message);
Toast toast = new Toast(context);
toast.setGravity(Gravity.FILL_HORIZONTAL | Gravity.BOTTOM, 0, 0);
toast.setDuration(Toast.LENGTH_SHORT);
toast.setView(layout);
toast.show();
}
}
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