Question

我的项目中有一个LinearLayout和一些按钮。我想在点击每个Button时从drawable向LinearLayout添加一个小图像。如何以编程方式将图像添加到LinearLayout？

这是我在HorizontalScrollView中的LinearLayout：

     <HorizontalScrollView
        android:id="@+id/horizontalScrollView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top|center"
        >

        <LinearLayout
            android:id="@+id/LinearLayout1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >


        </LinearLayout>
    </HorizontalScrollView>

这是我的活动：

public class MainActivity extends Activity
{

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

            final LinearLayout notes = (LinearLayout)  findViewById(R.id.LinearLayout_notes);
            final  ImageView notes_do = new ImageView(this);
            notes_do.setBackgroundResource(R.drawable.notes_do);

    new Thread(new Runnable() {
        @Override
        public void run() {

    final ImageButton img_1 = (ImageButton) findViewById(R.id.img_1_);
    img_1.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

        if( event.getAction() ==  MotionEvent.ACTION_DOWN ) {

              notes.addView(notes_do);

        }
            return true;
        } 

       });  // end of ontouch

           }
          }).start(); // end of thread      


} // end of oncreate
}// end of activity

谢谢。

Answer 1

    LinearLayout ll = (LinearLayout)findViewById(R.id.LinearLayout1);
for(int i=0;i<5;i++)
{
        ImageView ii= new ImageView(this);
        ii.setBackgroundResource(R.drawable.ic_action_search);
        ll.addView(ii);
}

Answer 2

您可以对linearlayout执行findViewById，并在按钮的onclicklistener中动态添加一个imageview

LinearLayout linLay = (LinearLayout)findViewById(R.id.LinearLayout1);
ImageView image = new ImageView(this);
//add image to imageview
...
linLay.addView(image);

Answer 3

        ImageView img = new ImageView( this);
        LinearLayout rl = (LinearLayout) findViewById(R.id.LinearLayout1);
        LinearLayout.LayoutParams viewParamsCenter = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        img.setImageResource(R.drawable.ic_launcher);
        img.setLayoutParams(viewParamsCenter);
        rl.add(img);

Answer 4

如果要动态设置图像，请单击按钮。您可以将图像视图添加到线性布局

    View LinearLayout1 = findViewById(R.id.Layout1);
    ImageView image1 = new ImageView(getApplicationContext());
    String uri = "@drawable/myresource.png"; // Here you can set the name of
                                                // the image dynamically
    int imageResource = getResources().getIdentifier(uri, null,
            getPackageName());
    Drawable res = getResources().getDrawable(imageResource);
    image1.setImageDrawable(res);
    ((ViewGroup) LinearLayout1).addView(image1);

如何以编程方式将图像添加到LinearLayout？

4 个答案: