重构Toast语法

原例:Toast toast.makeText(AtmActivity.this,s,Toast.LENGTH_LONG);
   toast.show();

 

1.使用匿名对象改写程序代码,语法如下:
类名称 .方法一()
.方法二()
.方法三()
....
.方法N();


例子:Toast .makeText(AtmActivity.this,s,Toast.LENGTH_LONG)
    .show();

2.使用getApplicationContext()取代主程序类
例子:Toast .makeText(getApplicationContext(),s,Toast.LENGTH_LONG)
.show();

转载于:https://www.cnblogs.com/hasman/p/4387672.html

package com.example.myapp; import android.app.Activity; import android.app.AlertDialog; import android.content.Intent; import android.os.Bundle; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MyActivity extends Activity { private Button button0; private Button button1; private Button button2; private EditText editText1; @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); setIntent(intent); // 更新当前intent } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_activity); button0 = findViewById(R.id.button0); button1 = findViewById(R.id.button1); button2 = findViewById(R.id.button2); editText1=findViewById(R.id.edt1); AlertDialog.Builder builder = new AlertDialog.Builder(this); button0.setOnClickListener(view -> { new AlertDialog.Builder(MyActivity.this) .setTitle("《静夜思》李白") .setMessage("床前明月光,疑是地上霜。\n举头望明月,低头思故乡。") .setPositiveButton("赏析", (dialog, which) -> { Toast.makeText(MyActivity.this, "此诗描写秋夜思乡之情", Toast.LENGTH_SHORT).show(); }) .setNegativeButton("关闭", null) .show(); }); button1.setOnClickListener(view -> { String input = editText1.getText().toString().trim(); if (input.isEmpty()) { Toast.makeText(this, "请输入内容", Toast.LENGTH_SHORT).show(); return; } new AlertDialog.Builder(this) .setTitle("系统提示") .setMessage(input) .setPositiveButton("确认", (d, w) -> { Toast.makeText(this, "提交成功", Toast.LENGTH_LONG).show(); }) .show(); //Toast.makeText(MyActivity.this, input, Toast.LENGTH_LONG).show(); //Toast.makeText(MyActivity.this , "按钮1被点击" , Toast.LENGTH_LONG).show(); }); button2.setOnClickListener(view -> { startActivity(new Intent(MyActivity.this, SecondActivity.class)); }); } } 这样写好不好
03-09
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