Android Toast弹出消息在指定位置（setGravity）

import android.widget.Toast
import android.view.Gravity

默认Toast是显示在底部的，可以通过以下方法让其显示在顶部正中

Toast toast = Toast.makeText(SearchActivity.this, "取消关注失败", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0); toast.show();

这样设置会使Toast在中间弹出

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  }

  public void upperLeft(View v) {
    Toast toast = Toast.makeText(this, "Upper Left!",
        Toast.LENGTH_SHORT);
    toast.setGravity(Gravity.TOP | Gravity.LEFT, 0, 0);
    toast.show();
  }

  public void upperRight(View v) {
    Toast toast = Toast.makeText(this, "Upper Right!",
        Toast.LENGTH_SHORT);
    toast.setGravity(Gravity.TOP | Gravity.RIGHT, 0, 0);
    toast.show();
  }

  public void bottomLeft(View v) {
    Toast toast = Toast.makeText(this, "Bottom Left!",
        Toast.LENGTH_SHORT);

    toast.setGravity(Gravity.BOTTOM | Gravity.LEFT, 0, 0);
    toast.show();
  }

  public void bottomRight(View v) {
    Toast toast = Toast.makeText(this, "Bottom Right!",
        Toast.LENGTH_SHORT);
    toast.setGravity(Gravity.BOTTOM | Gravity.RIGHT, 0, 0);
    toast.show();
  }

默认Toast是显示在底部的，可以通过以下方法让其显示在顶部正中

Toast mToast = Toast.makeText(
this,
R.string.correct_toast,
Toast.LENGTH_SHORT
)
mToast.setGravity(Gravity.TOP,0,0)
mToast.show()

#顶部，水平居中
Toast toast= Toast.makeText(getApplicationContext(),
"Your string here", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.TOP|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();

通过以下方法让其显示在右上角：
private int getScreenWidth() {
DisplayMetrics outMetrics = new DisplayMetrics();
windowManager.defaultDisplay.getMetrics(outMetrics);
Log.i("width", outMetrics.toString());
return outMetrics.widthPixels;
}

mToast.setGravity(Gravity.TOP, getScreenWidth()/2, 0);

#底部 右边
Toast toast = Toast.makeText(this, "Custom toast creation", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.BOTTOM | Gravity.RIGHT,0,0);
toast.show();

refs:https://blog.csdn.net/xuanshao_/article/details/106502177