android - 非静态方法 putExtra 并且找不到符号方法

Question

我是一名 PHP 开发人员，但今天我需要面对 Android Studio。

我想将输入文本发送到另一个 Activity 。但是我有一些错误:

error: non-static method putExtra(String,String) cannot be referencedfrom a static context error: cannot find symbol method StartActivity(Intent)

public class MainActivity extends AppCompatActivity {
  public final static String EXTRA_MESSAGE = "com.proj.proj";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  }

  public void sendMessage(View view){
    Intent intent = new Intent(this, main.class);
    EditText editText = (EditText) findViewById(R.id.main);
    String message = editText.getText().toString();
    Intent.putExtra(EXTRA_MESSAGE, message);
    StartActivity(intent);
  }
}

怎么了？

Answer 1

使用 intent 的正确实例，而不是 Intent。

public class MainActivity extends AppCompatActivity {

  EditText editText;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    editText = (EditText) findViewById(R.id.main);
  }

  public void sendMessage(View view){
    Intent intent = new Intent(this, main.class);

    String message = editText.getText().toString();
    intent.putExtra("com.proj.proj", message);
    startActivity(intent);
  }
}