Android Toast使用的简单小结(推荐)

public class ToastActivity extends BaseTitleActivity {
 
 @BindView(R.id.btn_basic_toast)
 Button basicToast;
 @BindView(R.id.btn_basic_toast2)
 Button basicToast2;
 @BindView(R.id.btn_custom_location)
 Button customLocation;
 @BindView(R.id.btn_custom_picture)
 Button customPicture;
 @BindView(R.id.btn_custom_smile)
 Button customSmile;
 @BindView(R.id.btn_custom_smile2)
 Button customSmile2;
 
// private static CustomToast customToastView;
 
 
 public static void newInstance(Context context){
 
  Intent intent = new Intent(context, ToastActivity.class);
  context.startActivity(intent);
 }
 
 @Override
 protected void onCreate(@Nullable Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
 }
 
 @Override
 public int getResourcesId() {
  return R.layout.activity_toast;
 }
 
 @Override
 public void initView() {
 
 }
 
 @Override
 public void initData() {
 
 }
 
 @Override
 public int getTitleText() {
  return R.string.play_toast;
 }
 
 @OnClick( {R.id.btn_basic_toast, R.id.btn_custom_location, R.id.btn_custom_picture, R.id.btn_custom_smile, R.id.btn_custom_smile2,
    R.id.btn_basic_toast2} )
 public void onViewClick(View v){
 
  switch (v.getId()){
 
   /* 最基本的Toast，解决了原生Toast不能快速更新的问题 */
   case R.id.btn_basic_toast:
    ToastUtils.showToast(this, "这是最基本的Toast");
    break;
   case R.id.btn_basic_toast2:
    ToastUtils.showToast(this, "===已更新===");
    break;
 
   /* 自定义位置的Toast
    * 相对于Gravity.LEFT位置， x方向上的偏移量, y方向上的偏移量 */
   case R.id.btn_custom_location:
    Toast toast = Toast.makeText(ToastActivity.this, "自定义位置的Toast", Toast.LENGTH_SHORT);
    toast.setGravity(Gravity.LEFT,0, 0);
    toast.show();
    break;
 
   /* 带图片的Toast，自定义布局
    * 参考 Toast.makeText() 方法 */
   case R.id.btn_custom_picture:
    Toast result = new Toast(this);
    View toastView = LayoutInflater.from(this).inflate(R.layout.toast_custom, null);
    ImageView img = (ImageView) toastView.findViewById(R.id.iv_img);
    TextView msg = (TextView) toastView.findViewById(R.id.tv_msg);
    img.setImageResource(R.mipmap.jyfr_icon_mpossh3x);
    msg.setText(R.string.picture_toast);
 
    result.setView(toastView);
    result.setGravity(Gravity.BOTTOM, 0 , 0);
    result.setDuration(Toast.LENGTH_SHORT);
    result.show();
    break;
 
   /* 自定义Toast控件，带个动画效果
    * 解决了原生Toast不能快速更新的问题
    * 但是并没有摆脱原生Toast显示方法的调用 */
   case R.id.btn_custom_smile:
    ToastUtils.showToast(this, "在看我", true);
    break;
   case R.id.btn_custom_smile2:
    ToastUtils.showToast(this, "==还在看我==", true);
    break;
 
   default:
    break;
  }
 }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:padding="10dp"
 android:background="@drawable/shape_background_toast">
 
 <ImageView
  android:id="@+id/iv_img"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_gravity="center"
  android:scaleType="center"
  android:visibility="visible"/>
 
 <com.example.xuetaotao.helloworld.widget.CustomToast
  android:id="@+id/smileView"
  android:layout_width="50dp"
  android:layout_height="50dp"
  android:layout_margin="10dp"
  android:layout_gravity="center" />
 
 <TextView
  android:id="@+id/tv_msg"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_gravity="center"
  android:text=""
  android:textSize="18sp"
  android:textColor="@color/common_blue"/>
 
</LinearLayout>

public class CustomToast extends View {
 
 /**
  * 初始化一些变量
  * 实现3个构造函数
  * 初始化画笔参数和矩形参数
  * 设置画笔的参数及矩形的参数
  * 重写onMeasure：onMeasure()方法中主要负责测量，决定控件本身或其子控件所占的宽高
  * 重写onDraw：onDraw()方法负责绘制，即如果我们希望得到的效果在Android原生控件中没有现成的支持，那么我们就需要自己绘制我们的自定义控件的显示效果。
  * 自定义View中的动画效果实现
  */
 private Toast toast;
 private Context context;
 
 RectF rectF = new RectF(); //矩形，设置Toast布局时使用
 ValueAnimator valueAnimator; //属性动画
 private Paint paint; //自定义View的画笔
 
 float mAnimatedValue = 0f;
 private float mWidth = 0f; //view的宽
 private float mPadding = 0f; //view的内边距
 private float endAngle = 0f; //圆弧结束的度数
 
 private float mEyeWidth = 0f; //笑脸的眼睛半径
 private boolean isSmileLeft = false;
 private boolean isSmileRight = false;
 
 public CustomToast(Context context){
  super(context);
  this.context = context;
 }
 
 public CustomToast(Context context, AttributeSet attrs){
  super(context, attrs);
  this.context = context;
 }
 
 public CustomToast(Context context, AttributeSet attrs, int defStyleAttr){
  super(context, attrs, defStyleAttr);
  this.context = context;
 }
 
 private void initPaint(){
  paint = new Paint();
  paint.setAntiAlias(true); //抗锯齿
  paint.setStyle(Paint.Style.STROKE); //画笔的样式：空心
  paint.setColor(Color.parseColor("#5cb85c")); //绘制的颜色
  paint.setStrokeWidth(dip2px(2)); //设置笔刷的粗细
 }
 
 private void initRect(){
  rectF = new RectF(mPadding, mPadding, mWidth-mPadding, mWidth-mPadding);
 }
 
 //dip转px。为了支持多分辨率手机
 public int dip2px(float dpValue){
  final float scale = getContext().getResources().getDisplayMetrics().density;
  return (int) (dpValue * scale + 0.5f);
 }
 
 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  initPaint();
  initRect();
  mWidth = getMeasuredWidth(); //view的宽度
  mPadding = dip2px(10);
  mEyeWidth = dip2px(3);
 }
 
 //每次触摸了自定义View/ViewGroup时都会触发onDraw()方法
 @Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  paint.setStyle(Paint.Style.STROKE);
  canvas.drawArc(rectF, 180, endAngle, false, paint ); //画微笑圆弧
  paint.setStyle(Paint.Style.FILL); //画笔的样式：实心
  if (isSmileLeft){
   canvas.drawCircle(mPadding+mEyeWidth+mEyeWidth/2, mWidth/3, mEyeWidth, paint); //绘制圆圈
  }
  if (isSmileRight){
   canvas.drawCircle(mWidth-mPadding-mEyeWidth-mEyeWidth/2, mWidth/3, mEyeWidth, paint);
  }
 }
 
 //开启动画
 public void startAnimator(boolean playAnimate){
  if (playAnimate){
   stopAnimator();
   startViewAnim(0f, 1f, 2000);
  }
 }
 
 //停止动画
 public void stopAnimator(){
  if (valueAnimator != null){
   clearAnimation();
   isSmileLeft = false;
   isSmileRight = false;
   mAnimatedValue = 0f;
   valueAnimator.end();
  }
 }
 
 /**
  * 开始动画
  * @param start 起始值
  * @param end 结束值
  * @param time 动画的时间
  * @return
  */
 public ValueAnimator startViewAnim(float start, float end, long time){
 
  valueAnimator = ValueAnimator.ofFloat(start, end); //设置 ValueAnimator 的起始值和结束值
  valueAnimator.setDuration(time); //设置动画时间
  valueAnimator.setInterpolator(new LinearInterpolator()); //设置补间器，控制动画的变化速率
  valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { //设置监听器。监听动画值的变化，做出相应方式
   @Override
   public void onAnimationUpdate(ValueAnimator animation) {
    mAnimatedValue = (float) valueAnimator.getAnimatedValue();
    if (mAnimatedValue < 0.5){
     isSmileLeft = false;
     isSmileRight = false;
     endAngle = -360 * (mAnimatedValue);
    } else if (mAnimatedValue > 0.55 && mAnimatedValue < 0.7){
     endAngle = -180;
     isSmileLeft = true;
     isSmileRight = false;
    } else{
     endAngle = -180;
     isSmileLeft = true;
     isSmileRight = true;
    }
    postInvalidate();  //重绘
   }
  });
 
  if (!valueAnimator.isRunning()){
   valueAnimator.start();
  }
  return valueAnimator;
 }
 
 /**
  * 本质上还是依赖Android原生Toast的显示方法来进行显示，
  * 只是引入了自定义的布局，添加了自定义动画
  */
 public void show(String message, boolean playAnimate){
 
  /* 解决多次点击Toast一直提示不消失问题 */
  if (toast == null){
   toast = new Toast(context);
  }
  View customToastView = LayoutInflater.from(context).inflate(R.layout.toast_custom, null);
  TextView msg2 = (TextView) customToastView.findViewById(R.id.tv_msg);
  msg2.setText(message);
  msg2.setBackgroundResource(R.drawable.shape_text_toast);
  msg2.setTextColor(Color.parseColor("#ffffff"));
 
  ImageView img2 = (ImageView) customToastView.findViewById(R.id.iv_img);
  img2.setImageResource(R.mipmap.jyfr_icon_mpossh3x);
//  img2.setVisibility(View.GONE);
 
  CustomToast customToast = (CustomToast) customToastView.findViewById(R.id.smileView);
  customToast.startAnimator(playAnimate);
 
  toast.setView(customToastView);
  toast.setGravity(Gravity.BOTTOM, 0 , 0);
  toast.setDuration(Toast.LENGTH_SHORT);
  toast.show();
 }
 
}

public class ToastUtils {
 
 private static Toast toast;
 
 private static CustomToast customToast;
 
 /**
  * 自定义CustomToast的显示
  * @param context 上下文
  * @param message 提示内容
  * @param playAnimate 是否显示动画 true，显示  false，不显示
  */
 public static void showToast(Context context, String message, boolean playAnimate){
 
  if (customToast == null){
   customToast = new CustomToast(context);
  }
  customToast.show(message, playAnimate);
 }
 
 
 /**
  * Android原生Toast的显示，主要解决点多少就提示多少次的问题
  */
 public static void showToast(Context context, String content){
 
  if (toast == null){
   toast = Toast.makeText(context, content, Toast.LENGTH_SHORT);
  } else {
   toast.setText(content);
  }
  toast.show();
 }
 
}