原生Toast不满足业务需求：
1、提示消息只能一条一条展示(需要等待上一次的消息提示完成)
2、大量频繁创建Toast消息会出现崩溃，比如用for循环来测试
仿Toast：ImitateToast
1、立即更新提示消息，无需等待上一次消息完成提示
2、自始至终只创建一个TextView，大量频繁创建提示消息也不会崩溃
3、可按业务需求在指定位置上显示提示消息
源码ImitateToast.java
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.content.Context;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.os.Build;
import android.provider.Settings;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;
import androidx.annotation.NonNull;
import java.util.Timer;
import java.util.TimerTask;
import jsc.org.lib.basic.R;
import jsc.org.lib.basic.utils.ViewOutlineUtils;
public final class ImitateToast {
private static class SingletonHolder {
private static final ImitateToast INSTANCE = new ImitateToast();
}
private WindowManager mWindowManager = null;
private TextView mView = null;
private Timer mTimer = null;
private WindowManager.LayoutParams mDefaultLayoutParams = null;
private WindowManager.LayoutParams mCustomLayoutParams = null;
private int mLayoutParamsModel = 0;//0 default, 1 custom
private ImitateToast() {
}
private static ImitateToast getInstance() {
return SingletonHolder.INSTANCE;
}
private void register(Context context, int gravity, int x, int y, OnViewInitializeListener listener) {
if (mWindowManager == null) {
mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
mDefaultLayoutParams = createLayoutParams(gravity, x, y);
mCustomLayoutParams = createLayoutParams(gravity, x, y);
int padding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 12, context.getResources().getDisplayMetrics());
mView = new TextView(context.getApplicationContext());
mView.setGravity(Gravity.CENTER);
mView.setTextColor(Color.WHITE);
mView.setBackgroundColor(0xBF000000);
mView.setPadding(padding, padding / 3, padding, padding / 3);
mView.setMinWidth(context.getResources().getDisplayMetrics().widthPixels / 4);
mView.setMaxWidth(context.getResources().getDisplayMetrics().widthPixels * 4 / 5);
mView.setMaxLines(32);
ViewOutlineUtils.applyHorizontalEllipticOutline(mView);
if (listener != null) {
listener.onViewInitialize(mView);
}
}
}
private WindowManager.LayoutParams createLayoutParams(int gravity, int x, int y) {
WindowManager.LayoutParams params = new WindowManager.LayoutParams();
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.format = PixelFormat.TRANSLUCENT;
params.windowAnimations = R.style.ImitateWindowAnimStyle;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
params.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
params.type = WindowManager.LayoutParams.TYPE_TOAST;
}
params.setTitle("Toast");
params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
| WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
| WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
params.gravity = gravity;
params.x = x;
params.y = y;
return params;
}
private void unregister() {
cancelDisappear(true);
mView = null;
mWindowManager = null;
mDefaultLayoutParams = null;
mCustomLayoutParams = null;
}
private void showTextInDefaultModel(CharSequence text, long delay) {
if (mWindowManager == null)
throw new IllegalStateException("Please register first.");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !Settings.canDrawOverlays(mView.getContext()))
throw new IllegalStateException("No permission for Settings.ACTION_MANAGE_OVERLAY_PERMISSION.");
cancelDisappear(mLayoutParamsModel == 1);
mView.setText(text);
if (mView.getParent() == null) {
mWindowManager.addView(mView, mDefaultLayoutParams);
mLayoutParamsModel = 0;
ObjectAnimator.ofPropertyValuesHolder(
mView,
PropertyValuesHolder.ofFloat(View.ALPHA, .75f, 1.0f),
PropertyValuesHolder.ofFloat(View.SCALE_X, 1.0f, 1.2f, 1.0f),
PropertyValuesHolder.ofFloat(View.SCALE_Y, 1.0f, 1.2f, 1.0f))
.setDuration(250L)
.start();
}
scheduleDisappear(delay);
}
private void showTextInCustomModel(CharSequence text, int gravity, int x, int y, long delay) {
if (mWindowManager == null)
throw new IllegalStateException("Please register first.");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !Settings.canDrawOverlays(mView.getContext()))
throw new IllegalStateException("No permission for Settings.ACTION_MANAGE_OVERLAY_PERMISSION.");
cancelDisappear(mLayoutParamsModel == 0);
mView.setText(text);
boolean gravityChanged = mCustomLayoutParams.gravity != gravity;
boolean xChanged = mCustomLayoutParams.x != x;
boolean yChanged = mCustomLayoutParams.y != y;
boolean changed = gravityChanged || xChanged || yChanged;
if (changed) {
mCustomLayoutParams.gravity = gravity;
mCustomLayoutParams.x = x;
mCustomLayoutParams.y = y;
}
if (mView.getParent() == null) {
mWindowManager.addView(mView, mCustomLayoutParams);
mLayoutParamsModel = 1;
ObjectAnimator.ofPropertyValuesHolder(
mView,
PropertyValuesHolder.ofFloat(View.ALPHA, .75f, 1.0f),
PropertyValuesHolder.ofFloat(View.SCALE_X, 1.0f, 1.2f, 1.0f),
PropertyValuesHolder.ofFloat(View.SCALE_Y, 1.0f, 1.2f, 1.0f))
.setDuration(250L)
.start();
} else if (changed) {
mWindowManager.updateViewLayout(mView, mCustomLayoutParams);
}
scheduleDisappear(delay);
}
private void scheduleDisappear(long delay) {
if (mTimer == null) {
mTimer = new Timer();
mTimer.schedule(new TimerTask() {
@Override
public void run() {
mWindowManager.removeView(mView);
mTimer = null;
}
}, delay);
}
}
private void cancelDisappear(boolean detach) {
if (mTimer != null) {
mTimer.cancel();
mTimer = null;
}
if (detach && mWindowManager != null
&& mView != null
&& mView.getParent() != null) {
mWindowManager.removeView(mView);
}
}
public static void init(Context context, OnViewInitializeListener listener) {
init(context, Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM, 0, 48, listener);
}
public static void init(Context context, int gravity, int x, int y, OnViewInitializeListener listener) {
ImitateToast.getInstance().register(context, gravity, x, y, listener);
}
public static void show(CharSequence text) {
show(text, 2_500L);
}
public static void show(CharSequence text, long time) {
ImitateToast.getInstance().showTextInDefaultModel(text, time);
}
public static void show(CharSequence text, int gravity, int x, int y) {
show(text, gravity, x, y, 2_500L);
}
public static void show(CharSequence text, int gravity, int x, int y, long time) {
ImitateToast.getInstance().showTextInCustomModel(text, gravity, x, y, time);
}
public static void unInit() {
ImitateToast.getInstance().unregister();
}
public interface OnViewInitializeListener {
void onViewInitialize(@NonNull TextView view);
}
}
在Application中初始化
public class MainApp extends BaseApplication {
@Override
public void onCreate() {
super.onCreate();
...
ImitateToast.init(this, null);
}
@Override
public void onTerminate() {
super.onTerminate();
...
ImitateToast.unInit();
}
}
悬浮窗权限申请
ActivityResultLauncher<Intent> mDrawOverlaysLauncher = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result) {
onDrawOverlaysLaunchBack(result.getResultCode(), result.getData());
}
});
public final boolean canDrawOverlays(boolean toSetting) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) return true;
//Android6及以上版本，申请悬浮窗权限
boolean result = Settings.canDrawOverlays(this);
if (!result && toSetting) {
//manifest文件中需要申明"android.permission.SYSTEM_ALERT_WINDOW"权限
mDrawOverlaysLauncher.launch(new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION));
}
return result;
}
ImitateToast使用
ImitateToast.show("clicked button");
更多实用工具分享：https://github.com/JustinRoom/Basic
