在项目中遇到，图片下载的方法封装在imageUtils类中，下载要用Toast到提醒。如果在activity中可以用runOnUiThread和Handler来显示提醒，现在不是在activity，又不想在imageUtils中用Handler。所以想到如果有个全局的Toast就方便多了。
先上效果图：
Toast.gif
全局Toast:
1. 支持默认格式，自上向下布局为ImageView，TextView，TextView，三个控件可以自由组合显示或隐藏
2. 支持Top，Center，Bottom的位置显示
3. 支持多样的显示格式，可以传入自定义的layout的View
4. 共用一个Toast对象，防止多次Toast重叠并显示时间累加，该控件近保留最后一次的设置和显示。
5. 最好在自定义的Application中new该Toast，Activity，Fragment，Adapter中都可以直接调用。
自定义Toast代码如下， 用静态内部类Builder设置Toast的样式:
public class FlexibleToast {
public static final int GRAVITY_BOTTOM = 0;
public static final int GRAVITY_CENTER = 1;
public static final int GRAVITY_TOP = 2;
public static final int TOAST_SHORT = 0;
public static final int TOAST_LONG = 1;
private Context mContext;
private Toast flexibleToast;
public void toastShow(Builder builder) {
if (flexibleToast == null) {
flexibleToast = new Toast(mContext);
}
// toast position
if (builder.mGravity == GRAVITY_CENTER) {
flexibleToast.setGravity(Gravity.CENTER | Gravity.CENTER_VERTICAL, 0, 0);
} else if (builder.mGravity == GRAVITY_TOP) {
flexibleToast.setGravity(Gravity.TOP | Gravity.CENTER_VERTICAL, 0, Tools.dip2px(mContext, 20));
} else {
flexibleToast.setGravity(Gravity.BOTTOM | Gravity.CENTER_VERTICAL, 0, Tools.dip2px(mContext, 20));
}
if (builder.mDuration == TOAST_LONG) {
flexibleToast.setDuration(Toast.LENGTH_LONG);
} else {
flexibleToast.setDuration(Toast.LENGTH_SHORT);
}
if (builder.hasCustomerView && builder.mCustomerView != null) {
flexibleToast.setView(builder.mCustomerView);
} else {
flexibleToast.setView(builder.mDefaultView);
}
flexibleToast.show();
}
public FlexibleToast(Context context) {
mContext = context;
}
/**
* 控制Toast的显示样式
*/
public static class Builder {
private View mDefaultView;
private View mCustomerView;
private ImageView mIvImage;
private TextView mTvFirst;
private TextView mTvSecond;
private View dividerFirst;
private View dividerSecond;
private int mDuration = Toast.LENGTH_SHORT;// 0 short, 1 long
private int mGravity = 0;
private boolean hasCustomerView = false; // 是否使用自定义layout
/**
* 使用全局的ApplicationContext进行初始化
* @param context
*/
public Builder(Context context) {
mDefaultView = LayoutInflater.from(context).inflate(R.layout.layout_toast_flexible, null);
mIvImage = (ImageView) mDefaultView.findViewById(R.id.iv_img);
mTvFirst = (TextView) mDefaultView.findViewById(R.id.tv_text_first);
mTvSecond = (TextView) mDefaultView.findViewById(R.id.tv_text_second);
dividerFirst = mDefaultView.findViewById(R.id.divider_first);
dividerSecond = mDefaultView.findViewById(R.id.divider_second);
}
public Builder setImageResource(int resId) {
this.mIvImage.setImageResource(resId);
this.mIvImage.setVisibility(View.VISIBLE);
this.dividerFirst.setVisibility(View.VISIBLE);
return this;
}
public Builder setFirstText(String firstText) {
this.mTvFirst.setText(firstText);
this.mTvFirst.setVisibility(View.VISIBLE);
this.dividerSecond.setVisibility(View.VISIBLE);
return this;
}
public Builder setSecondText(String secondText) {
this.mTvSecond.setText(secondText);
this.mTvSecond.setVisibility(View.VISIBLE);
return this;
}
public Builder setDuration(int duration) {
this.mDuration = duration;
return this;
}
public Builder setGravity(int gravity) {
this.mGravity = gravity;
return this;
}
/**
* 为Toast指定自定义的layout，此时上面对ImageView和TextView的设置失效。
* @param customerView
* @return
*/
public Builder setCustomerView(View customerView) {
this.mCustomerView = customerView;
this.hasCustomerView = true;
return this;
}
}
}
在Application中初始化自定义Toast:
创建自定义ToastflexibleToast = new FlexibleToast(this)，然后提供方法toastShowByBuilder()供调用传builder设置样式
public class BaseApp extends Application {
// 全局的 handler 对象
private final Handler appHandler = new Handler();
// 全局的 Toast 对象
private FlexibleToast flexibleToast;
private static BaseApp instance;
public static void setInstance(BaseApp instance) {
BaseApp.instance = instance;
}
public static BaseApp getInstance() {
return instance;
}
@Override
public void onCreate() {
super.onCreate();
setInstance(this);
flexibleToast = new FlexibleToast(this);
Log.i("TAG","主线程"+Thread.currentThread().getId());
}
public Handler getAppHandler() {
return appHandler;
}
public void toastShowByBuilder(final FlexibleToast.Builder builder) {
if (Looper.myLooper() != Looper.getMainLooper()) {
getAppHandler().post(new Runnable() {
@Override
public void run() {
flexibleToast.toastShow(builder);
}
});
} else {
flexibleToast.toastShow(builder);
}
}
}
下面分别列出Toast在屏幕中间、子线程、自定义显示的用法：
设置显示位置在屏幕中间：
FlexibleToast.Builder builder = new FlexibleToast.Builder(MainActivity.this)
.setGravity(FlexibleToast.GRAVITY_CENTER)
.setFirstText("中间").setSecondText("提醒");
BaseApp.getInstance().toastShowByBuilder(builder);
在子线程显示：
new Thread(new Runnable() {
@Override
public void run() {
Log.i("TAG","子线程");
FlexibleToast.Builder builder = new FlexibleToast.Builder(MainActivity.this)
.setGravity(FlexibleToast.GRAVITY_BOTTOM)
.setFirstText("底部").setSecondText("提醒");
BaseApp.getInstance().toastShowByBuilder(builder);
}
}).start();
自定义样式：
final View customview= LayoutInflater
.from(this)
.inflate(R.layout.item,null,false);
FlexibleToast.Builder builder = new FlexibleToast.Builder(MainActivity.this)
.setGravity(FlexibleToast.GRAVITY_BOTTOM)
.setCustomerView(customview);
BaseApp.getInstance().toastShowByBuilder(builder);
git上源代码地址，欢迎指出错误哈！
SnackBar是 Android Support Library 22.2.0 里面新增提供的一个控件。SnackBar默认从屏幕底部弹出，像Toast一样会自动消失，当然也可以手动划出屏幕消失。Toast是不能交互的，而如果需要，SnackBar默认是可以添加一个点击事件的。效果如下：
snackbar.gif
普通snackbar代码如下：
snckbar可以设置回调setCallback(new Snackbar.Callback())显示和取消分别处理，不知道snackbar的用法，请点击
还在用Toast？试试Snackbar!
Snackbar snackbar = Snackbar.make(button3,"normalSnackbar", LENGTH_LONG).setActionTextColor(getResources().getColor(R.color.white))
/* .setCallback(new Snackbar.Callback() {
@Override
public void onDismissed(Snackbar snackbar, int event) {
super.onDismissed(snackbar, event);
FlexibleToast.Builder builder = new FlexibleToast.Builder(MainActivity.this)
.setGravity(FlexibleToast.GRAVITY_CENTER)
.setFirstText("回调dismiss");
BaseApp.getInstance().toastShowByBuilder(builder);
}
@Override
public void onShown(Snackbar snackbar) {
super.onShown(snackbar);
FlexibleToast.Builder builder = new FlexibleToast.Builder(MainActivity.this)
.setGravity(FlexibleToast.GRAVITY_CENTER).setFirstText("回调show");
BaseApp.getInstance().toastShowByBuilder(builder);
}
})*/
.setAction("点击", new View.OnClickListener() {
@Override
public void onClick(View v) {
FlexibleToast.Builder builder = new FlexibleToast.Builder(MainActivity.this)
.setGravity(FlexibleToast.GRAVITY_CENTER).setFirstText("中间toast");
BaseApp.getInstance().toastShowByBuilder(builder);
}
});
snackbar.show();
自定义snackbar代码如下：
Snackbar snackbar = Snackbar.make(findViewById(R.id.button4),"自定义",Snackbar.LENGTH_LONG);
View view = snackbar.getView();
ViewGroup.LayoutParams Params = view.getLayoutParams();
view.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
CoordinatorLayout.LayoutParams layoutParams = new CoordinatorLayout.LayoutParams(Params.width,Params.height);
layoutParams.gravity = Gravity.TOP;
// TODO 为什么设置居中没反应
// layoutParams.gravity = Gravity.CENTER;为什么设置居中没反应
view.setLayoutParams(layoutParams);
view.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
// view.setAnimation();
ImageView imageView = new ImageView(MainActivity.this);
imageView.setLayoutParams(new ViewGroup.LayoutParams(100,100));
imageView.setImageDrawable(getResources().getDrawable(R.drawable.lufei));
Snackbar.SnackbarLayout snackbarLayout = (Snackbar.SnackbarLayout) view;
snackbarLayout.setOrientation(LinearLayout.HORIZONTAL);
snackbarLayout.addView(imageView);
snackbar.setAction("点击", new View.OnClickListener() {
@Override
public void onClick(View v) {
FlexibleToast.Builder builder = new FlexibleToast.Builder(MainActivity.this).setGravity(FlexibleToast.GRAVITY_CENTER).setFirstText("自定义的snackbar");
BaseApp.getInstance().toastShowByBuilder(builder);
}
}).show();
git上源代码地址，欢迎指出错误哈！
想要设置snackbar剧中显示layoutParams.gravity = Gravity.CENTER;居然没有效果，不知道哪里出错了，有哪个兄弟看到了能指出，不胜感激！！！
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