android - 为什么单击按钮后 Activity 没有改变？

尝试单击按钮即可更改活动时，我发现您必须使用Intent。但是在我的代码中使用它似乎无效。我的代码有任何问题吗？

  public class SearchActivity extends Activity implements OnClickListener{

    private ListView recipes;
    Intent intent;
    Button button;
    EditText input;

    public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);

          setContentView(R.layout.searchlist);

          //EditText input = (EditText)findViewById(R.id.recipeName);
          button = (Button)findViewById(R.id.submit);
          input = (EditText)findViewById(R.id.recipeName);

          //recipes = (ListView)findViewById(R.id.recipes);
          //recipes.setAdapter(new ArrayAdapter<String> (this, R.layout.main, getResources().getStringArray(R.array.BaconSandwich)));
          button.setOnClickListener(this);
      }

      public void onClick(View clicked) {

          String value = input.getText().toString();
          Toast.makeText(this, value, Toast.LENGTH_SHORT).show();

          if(clicked == button) {
            recipes = (ListView)findViewById(R.id.recipes);
            Toast.makeText(this, "It is working for this item.", Toast.LENGTH_SHORT).show();
            Intent i = new Intent(SearchActivity.this, RecipeMethodActivity.class);
            SearchActivity.this.startActivity(i);
          }
      }

我不确定这仅仅是一个简单的命名错误，还是我所说的错误方式。任何帮助都会很棒。

另外，我已将要更改为（RecipeMethodActivity）的活动添加到Android清单中。

最佳答案

您需要在onClick方法中检查视图的ID，如下所示：

public void onClick(View clicked) {

      String value = input.getText().toString();
      Toast.makeText(this, value, Toast.LENGTH_SHORT).show();

      if(clicked.getId() == R.id.submit) {
        recipes = (ListView)findViewById(R.id.recipes);
        Toast.makeText(this, "It is working for this item.", Toast.LENGTH_SHORT).show();
        Intent i = new Intent(SearchActivity.this, RecipeMethodActivity.class);
        SearchActivity.this.startActivity(i);
      }
  }