Toast替代者Snackbar

Snackbar是design support library中另一个组件,使用Snackbar我们可以在屏幕底部(大多时候)快速弹出消息,它和Toast非常相似,但是它更灵活一些,它能在弹出消息中做出更多的操作,某些情境下也能替换dialog。同时它支持用户向右滑动取消。

make() – 生成Snackbar消息
setAction() – 设置action
show() – 显示Snackbar消息

Snackbar.make(view,"我是消息内容",Snackbar.LENGTH_LONG)
.setAction("ok", new View.OnClickListener() {
    @Override
    public void onClick(View v) {

Toast.makeText(MainActivity.this,"ok",Toast.LENGTH_SHORT).show();
    }
}) .show();

效果图:
这里写图片描述

package com.example.kucun2; import android.app.ProgressDialog; import android.os.Bundle; import android.os.Looper; import android.util.Log; import android.view.Menu; import android.widget.Toast; import com.example.kucun2.DataPreserver.Data; import com.google.android.material.snackbar.Snackbar; import com.google.android.material.navigation.NavigationView; import androidx.appcompat.app.AppCompatActivity; import androidx.drawerlayout.widget.DrawerLayout; import androidx.navigation.NavController; import androidx.navigation.Navigation; import androidx.navigation.ui.AppBarConfiguration; import androidx.navigation.ui.NavigationUI; import com.example.kucun2.databinding.ActivityMainBinding; public class MainActivity extends AppCompatActivity { private AppBarConfiguration mAppBarConfiguration; private ActivityMainBinding binding; private OnDataLoadListener dataLoadListener; private static String TAG = "MainActivity"; private ProgressDialog progressDialog; // 等待对话框 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_loading); // 初始加载界面 loadAppData(); // 启动数据加载 } private void initUI() { // 确保在主线程执行 if (Looper.myLooper() != Looper.getMainLooper()) { runOnUiThread(this::initUI); return; } // 设置主布局 binding = ActivityMainBinding.inflate(getLayoutInflater()); setContentView(binding.getRoot()); Log.d(TAG, "initUI: setContentView(binding.getRoot());"); // 设置工具栏 setSupportActionBar(binding.appBarMain.toolbar); // FAB按钮点击事件 binding.appBarMain.fab.setOnClickListener(view -> Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null) .setAnchorView(R.id.fab).show() ); // 导航设置 DrawerLayout drawer = binding.drawerLayout; NavigationView navigationView = binding.navView; // 顶部导航配置 mAppBarConfiguration = new AppBarConfiguration.Builder( R.id.nav_home, R.id.nav_kucun, R.id.nav_add_jinhuo, R.id.nav_diandan) .setOpenableLayout(drawer) .build(); // 导航控制器设置 NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main); NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration); NavigationUI.setupWithNavController(navigationView, navController); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onSupportNavigateUp() { NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main); return NavigationUI.navigateUp(navController, mAppBarConfiguration) || super.onSupportNavigateUp(); } public interface OnDataLoadListener { void onDataLoaded(); void onDataError(); } public void setOnDataLoadListener(OnDataLoadListener listener) { this.dataLoadListener = listener; } private void loadAppData() { // 创建并显示等待对话框 progressDialog = new ProgressDialog(this); progressDialog.setMessage("数据加载中,请稍候..."); progressDialog.setCancelable(false); // 不可取消 progressDialog.setIndeterminate(true); // 无限循环样式 progressDialog.show(); Log.d(TAG, "loadAppData: 显示等待对话框"); // 根据Data类定义,使用两个Runnable回调 Data.loadAllData(getApplicationContext(), // 成功回调 () -> { runOnUiThread(() -> { if (progressDialog != null && progressDialog.isShowing()) { progressDialog.dismiss(); } initUI(); if (dataLoadListener != null) { dataLoadListener.onDataLoaded(); } Toast.makeText(MainActivity.this, "数据加载成功", Toast.LENGTH_SHORT).show(); Data.startPeriodicSync(MainActivity.this, 5); }); }, // 失败回调 () -> { runOnUiThread(() -> { if (progressDialog != null && progressDialog.isShowing()) { progressDialog.dismiss(); } if (dataLoadListener != null) { dataLoadListener.onDataError(); } Toast.makeText(MainActivity.this, "数据加载失败,请检查网络连接", Toast.LENGTH_LONG).show(); initUI(); // 即使失败也初始化UI }); } ); } @Override protected void onStop() { super.onStop(); if (isFinishing()) { Data.saveAllData(this); } } @Override protected void onDestroy() { super.onDestroy(); // 确保对话框关闭 if (progressDialog != null && progressDialog.isShowing()) { progressDialog.dismiss(); } progressDialog = null; Data.stopPeriodicSync(); // 确保数据保存 if (!isFinishing()) { Data.saveAllData(this); } } }
最新发布
06-29
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