Question

当我触摸屏幕时，我想在屏幕上显示多个textview标签。现在我使用的是我在xml中创建的标签（Textview），但是不能在xml中创建多个标签。有没有办法动态创建多个标签？我的代码：

public boolean onTouch(View arg0, MotionEvent event)
{
show tag();
}

    private void showTag() {
            if(tagFlag==0)
            {
                AbsoluteLayout.LayoutParams params = ((AbsoluteLayout.LayoutParams) _tagLiley.getLayoutParams());
                params.x = (int) tagX;
                params.y = (int) tagY;
                _tagLiley.setLayoutParams(params);
                _tagLiley.setVisibility(View.VISIBLE);  
                tag1=_categorySearchET.getText().toString().trim();
                _tagName.setText(tag1);
                _tagName.setTextSize(8);
                tagFlag=1;
            }
            else if (tagFlag==1) {
                AbsoluteLayout.LayoutParams params = ((AbsoluteLayout.LayoutParams) _tagLiley2.getLayoutParams());
                params.x = (int) tagX;
                params.y = (int) tagY;
                _tagLiley2.setLayoutParams(params);
                _tagLiley2.setVisibility(View.VISIBLE);
                tag2=_categorySearchET.getText().toString().trim();
                _tagName2.setText(tag2);
                _tagName2.setTextSize(8);
                tagFlag=2;
            }
            else if (tagFlag==2) {
                AbsoluteLayout.LayoutParams params = ((AbsoluteLayout.LayoutParams) _tagLiley3.getLayoutParams());
                params.x = (int) tagX;
                params.y = (int) tagY;
                _tagLiley3.setLayoutParams(params);
                _tagLiley3.setVisibility(View.VISIBLE);
                tag3=_categorySearchET.getText().toString().trim();
                _tagName3.setText(tag3);
                _tagName3.setTextSize(8);
            }
        }

Answer 1

我假设你想要在屏幕的触摸位置TextView显示文字。使用以下代码，

<强> activity_main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/Relative"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

</RelativeLayout>

<强> MainActivity.java

public class MainActivity extends Activity implements OnTouchListener {

    RelativeLayout rel;
    TextView text;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        rel=(RelativeLayout)findViewById(R.id.Relative);
        rel.setOnTouchListener(this);

    }
    @Override
    public boolean onTouch(View v, MotionEvent e) {
        int eventaction = e.getAction(); 
        int x,y;
          switch (eventaction ) { 
                case MotionEvent.ACTION_DOWN:{ // touch on the screen event
                     x = (int)e.getX();
                    y = (int)e.getY();

                }
                case MotionEvent.ACTION_MOVE:{ // move event
                   x = (int)e.getX();
                   y = (int)e.getY();



                }
                case MotionEvent.ACTION_UP:{  // finger up event
                    x = (int)e.getX();
                       y = (int)e.getY();
                       text=new TextView(getApplicationContext());
                       RelativeLayout.LayoutParams lp=new RelativeLayout.LayoutParams(100, 100);
                       lp.topMargin=y;
                       lp.leftMargin=x;
                       text.setTextColor(Color.BLACK);
                       text.setTextSize(20);
                      text.setText("("+x+","+y+")");
                      rel.addView(text, lp);
                    break;
                }
              }
        return false;

    }

}

希望它有所帮助。

如何在Android屏幕上点击屏幕上显示多个标签（Textview）..？

1 个答案: