自定义 Toast

Toast的布局文件：
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toasttext"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="#ffffff"
    android:textColor="#000000" />

需要调用toast时，只需调用以下方法即可，str为将要显示的字符串：

private void showToast(String str) {
Toast toast = Toast.makeText(ActivitySetsDetails2.this, "您已经收藏过了",
Toast.LENGTH_SHORT);
toast.setGravity(Gravity.BOTTOM, 0, 0);
View toastText = LayoutInflater.from(ActivitySetsDetails2.this)
.inflate(R.layout.toast_text, null);
TextView tv = (TextView) toastText.findViewById(R.id.toasttext);
tv.setText(str);
tv.setWidth(ActivityCommend.width);
tv.setHeight(cache.getHeight());
tv.setBackgroundColor(Color.GRAY);
tv.setGravity(Gravity.CENTER);
tv.setTextColor(Color.WHITE);
toast.setView(toastText);
toast.show();
}