一個小小工程師的心情抒發天地

- Toast 是一個消息的提示元件

- 可以隨意設定想要顯示的位置

- 自定義的內容 ( Ex : 圖片 )

- 簡單的封裝

Step1 . Xml

<Button
    android:id="@+id/btn_toast_1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="默認"/>


<Button
    android:id="@+id/btn_toast_2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="改變位置"/>


<Button
    android:id="@+id/btn_toast_3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="帶圖片(自定義)"/>


<Button
    android:id="@+id/btn_toast_4"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="ToastUtil"
    android:textAllCaps="false"/>

Step2.

package vision.google.com.camera;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import util.ToastUtil;

public class ToastActivity extends AppCompatActivity {

    private Button mBtnToast1,mBtnToast2,mBtnToast3,mBtnToast4;


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


        //Default
        mBtnToast1 = (Button)findViewById(R.id.btn_toast_1);

        //change position
        mBtnToast2 = (Button)findViewById(R.id.btn_toast_2);

        //with photo
        mBtnToast3 = (Button)findViewById(R.id.btn_toast_3);


        mBtnToast4 = (Button)findViewById(R.id.btn_toast_4);

        OnClick onClick = new OnClick();
        mBtnToast1.setOnClickListener(onClick);
        mBtnToast2.setOnClickListener(onClick);
        mBtnToast3.setOnClickListener(onClick);
        mBtnToast4.setOnClickListener(onClick);
    }

    class OnClick implements View.OnClickListener
    {
        @Override
        public void onClick(View v)
        {
            switch (v.getId())
            {
                case R.id.btn_toast_1:
                    Toast.makeText(getApplicationContext(),"Toast",Toast.LENGTH_LONG).show();
                    break;
                case R.id.btn_toast_2:
                    Toast toastCenter = Toast.makeText(getApplicationContext(),"Toast Center",Toast.LENGTH_LONG);
                    toastCenter.setGravity(Gravity.CENTER,0,0);
                    toastCenter.show();
                    break;
                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 = (ImageView) view.findViewById(R.id.iv_toast);
                    TextView textView = (TextView) view.findViewById(R.id.tv_toast);
                    imageView.setImageResource(R.drawable.flyfoxy);
                    textView.setText("Foxy ball ball");
                    toastCustom.setView(view);
                    toastCustom.setDuration(Toast.LENGTH_LONG);
                    toastCustom.show();
                    break;
                case R.id.btn_toast_4:
                    ToastUtil.showMsg(getApplicationContext(),"Toast Util");
                    break;
            }
        }

    }
}

Step3. (封裝類)

package util;

import android.content.Context;
import android.widget.Toast;

/**
 * Created by ericpeng on 2018/3/20.
 */

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();
    }
}