2020-08-24

UI组件之弹出组件(Toast)

Toast是一个消息提示组件
设置显示的位置
自定义显示内容(示例:添加一个图片)
简单封装
Toast默认是屏幕底部位置弹出:

Toast.makeText(ToastActivity.this,"Toast",Toast.LENGTH_LONG).show();

Toast弹出位置居中显示:

Toast toastCenter = Toast.makeText(getApplicationContext(),"居中Toast",Toast.LENGTH_LONG);
toastCenter.setGravity(Gravity.CENTER,0,0);
toastCenter.show();

自定义显示内容:

 case R.id.btn_toast_3:
                    Toast toastCustom = new Toast(getApplicationContext());
                    LayoutInflater inflater = LayoutInflater.from(ToastActivity.this);
                    View view = inflater.inflate(R.layout.layout_toast, null);
                    ImageView imageView = view.findViewById(R.id.iv_toast);
                    TextView textView = view.findViewById(R.id.tv_toast);
                    imageView.setImageResource(R.drawable.smile);
                    textView.setText("自定义Toast");
                    toastCustom.setView(view);
                    toastCustom.setDuration(Toast.LENGTH_LONG);
                    toastCustom.show();
                    break;

显示效果:图片加文字居中显示
关于Toast的简单封装:

public class ToastUtil {
    public static Toast mToast;
    public static void showMsg(Context context,String msg){
        if(mToast == null){
            mToast = Toast.makeText(context,msg,Toast.LENGTH_LONG);
        }else {
            mToast.setText(msg);
        }
        mToast.show();
    }
}
//使用  activity中
 case R.id.btn_toast_4:
                    ToastUtil.showMsg(getApplicationContext(),"封装Toast");
                    break;