android - 如何以编程方式将按钮添加到android中的LinearLayout

Question

如何在第二个 protected void finishButton 中使用 linearLayout 和 protected void onCreate 的 params 变量？我需要将 finishButton 添加到 linearLayout。这是我的代码:

public class MainActivity extends AppCompatActivity {
    public static int score = 0;


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

        ScrollView scrollView = (ScrollView) findViewById(R.id.scrollView);

        final LinearLayout linearLayout = new LinearLayout(this);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        linearLayout.setLayoutParams(params);
        linearLayout.setOrientation(linearLayout.VERTICAL);
        linearLayout.setPadding(0, 110, 0, 0);
        scrollView.addView(linearLayout);

        TextView iq_Test_Title = new TextView(this);
        iq_Test_Title.setText("Text");
        iq_Test_Title.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
        iq_Test_Title.setGravity(Gravity.CENTER);
        iq_Test_Title.setTextColor(Color.RED);
        linearLayout.addView(iq_Test_Title);

        finishButton();

        // other code
    }

    protected void finishButton() {
        final Button finishButton = new Button(this);
        finishButton.setText(R.string.finish_button);
        finishButton.setLayoutParams(params);
        linearLayout.addView(finishButton);

        finishButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finishButton.setEnabled(false);
            }
        });
    }
}

谢谢!

Answer 1

要访问 finishButton 方法中的 View ，只需将其设为类级变量即可:

public class MyActivity...
   private LinearLayout mLinearLayout;

   protected void onCreate(..){
      mLinearLayout = new LinearLayout(this);
      ...
   }

   private void finishButton(){
      ...
      mLinearLayout.addView(..);
   }
}