题
当我使用Toast
到在屏幕上显示一些弹出的文本,它显示在屏幕的底部,这是默认位置一点点之上的文本。
现在我想在屏幕或某处的中间,以显示它根据我的选择。
任何人都可以指导我如何实现这一目标?
解决方案
从的文档,
定位你的面包
一个标准吐司通知显示在靠近屏幕的底部, 水平居中。您可以更改与该位置
setGravity(int, int, int)
方法。这将接受三个参数:Gravity
常数,x-position
偏移,以及y-position
偏移。例如,如果你决定敬酒应该出现在 左上角,可以设置重力这样的:
toast.setGravity(Gravity.TOP|Gravity.LEFT, 0, 0);
如果您想要的位置轻推到右边,增加的价值 第二个参数。轻推下来,增加最后的值 参数。
其他提示
如果你得到指示必须调用makeText错误,下面的代码将解决这个问题:
Toast toast= Toast.makeText(getApplicationContext(),
"Your string here", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.TOP|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
您可以通过使用自定义您的吐司的位置:
setGravity(int gravity, int xOffset, int yOffset)
这让你非常具体的关于您希望您的吐司的位置是。
一个关于X偏移和Y偏移参数的最有用的事情之一就是你可以用它们来敬酒相对放置到某个视图。
例如,如果你想定制的吐司上的按钮顶部出现,你可以创建这样一个功能:
// 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();
}
Toast toast = Toast.makeText(test.this,"bbb", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
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();
在上面的代码是将有助于u到在屏幕中间显示烤面包或根据UR对于刚刚设置的吐司重力选择根据需要乌尔
注意:对于这个过程u必须使用吐司的对象
以改变颜色,位置和烤面包的背景颜色的方法是:
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();
在宝鼎屏幕设定吐司
toast.setView(view);
toast.setGravity(Gravity.BOTTOM , 0, 0); // here i am setting toast at bottom
toast.setDuration(Toast.LENGTH_LONG);
toast.show();
现在在底部
toast.setView(view);
toast.setGravity(Gravity.BOTTOM , 0, 0); // here i am setting toast at bottom
toast.setDuration(Toast.LENGTH_LONG);
toast.show();
以同样的方式,我们可以设置在左,右和中心也吐司
点击这里
//自定义吐司类在这里可以显示为期望的定制的或默认的烤面包)
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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