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原标题:putExtra doesn t work with textinputedittext
  • 时间:2024-02-13 22:51:27
  •  标签:
  • android

我有一个班子:

public class MainActivity2 extends AppCompatActivity {
    Button button5;
    TextInputEditText textoinput;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.addpriority);

        textoinput = findViewById(R.id.texto);
        String dados = textoinput.getText().toString();


        button5 = findViewById(R.id.button5);

        button5.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {

                Intent intent = new Intent(getApplicationContext(), MainActivityMenu.class);
                intent.putExtra("chave", dados);
                startActivity(intent);
            }
        });
    }
}

缩略语改为案文。 如果我从德劳改成“测试”,它就会发挥作用。

请告诉我什么是错的?

祝福

问题回答

因为你需要在浮标上运行。 从一开始,它就没有导致它不断更新新数据。

在你打算再次开展它所赢得的另一项活动时,每次在你看来,活动都是如此。

String dados=textoinput.getText().toString();

只有在主要活动产生之后,才会从编辑文本中找到,而听众则是一种方法,每当你点击 but子时,就叫他这样做了,这样,你一开始便会花多的时间才这样做。

    button5.setOnClickListener(new 
    View.OnClickListener() {
        public void onClick(View 
     view) {
     String dados = 
     textoinput.getText().toString();
            Intent intent = new 
      Intent(getApplicationContext(), 
       MainActivityMenu.class);
            intent.putExtra("chave", 
      dados);
            startActivity(intent);
        }
    });

考虑阅读关于应用活动的生命周期





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