实际上,主要布局是相对布局,实习生在其中包含相对布局。主要目标是将图像添加到内部相对布局中。
我试过这个但没有成功。这是我的代码:
import android.os.Bundle;
import android.view.Display;
import android.view.Gravity;
import android.view.animation.Animation;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.app.Activity;
import android.graphics.Point;
public class MainActivity extends Activity {
Display display;
Point point;
int width;
int height;
Animation up, down, right, left;
RelativeLayout rl, rl2;
Integer[] pics = { R.drawable.img1, R.drawable.img2,R.drawable.img3, R.drawable.img4,
R.drawable.img5, R.drawable.img6,R.drawable.img7, R.drawable.img8,
R.drawable.img9, R.drawable.img10,R.drawable.img11, R.drawable.img12,
R.drawable.img13, R.drawable.img14,R.drawable.img15};
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Init();
}
private void Init() {
// TODO Auto-generated method stub
rl = (RelativeLayout) findViewById(R.id.Rlayout);
rl.setGravity(Gravity.CENTER);
int x = 0;
int y = 0;
for(int i = 1 ; i<16 ; i++ ){
ImageView img = new ImageView(this);
img.setImageResource(pics[i-1]);
int tempx = img.getWidth();
int tempy = img.getHeight();
rl.addView(img, x, y);
x += tempx;
if(i%4 == 0){
x = 0;
y += tempy;
}
}
rl.bringToFront();
}
}
正在使用的布局的XML代码是:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/R1Layout">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:gravity="center"
android:id="@+id/Rlayout" >
</RelativeLayout>
</RelativeLayout>
我得到的输出是一个空白屏幕。
帮助我解决如何在内部相对布局中显示图像的方法
提前致谢,
答案 0 :(得分:1)
要将图像插入内部RelativeLayout,您需要使用ImageView对象。您可以使用RelativeLayout可用的addView()方法(通过从ViewGroup类继承)来实现。您可以在活动中按照以下方式执行此操作(您必须决定将其放置在何处):
RelativeLayout rl = (RelativeLayout) findViewById(R.id.Rlayout); // find inner layout
ImageView iview = new Image(this);
// Set image view parameters - refer to Android documentation for this
rl.addView(iview); // and so on.
// You can add as many items as you want to any layout you want in this manner
答案 1 :(得分:0)
我认为你是误解,x和y不是坐标,分别是宽度和高度
rl.addView(img, x, y);
并且您无法获得图片视图的大小:
int tempx = img.getWidth();
int tempy = img.getHeight();
您必须使用容器来设置图像视图的大小和坐标:
RelativeLayout.LayoutParams params;
params = new RelativeLayout.LayoutParams(100, 100);
params.leftMargin = x;
params.topMargin = y;
rl.addView(img,params);
这是一个如何做的例子:
private void Init() {
// TODO Auto-generated method stub
int x = 0;
int y = 0;
rl = (RelativeLayout) findViewById(R.id.Rlayout);
rl.setGravity(Gravity.CENTER);
for(int i = 0 ; i<14 ; i++ ){
ImageView img = new ImageView(this);
img.setImageResource(pics[i]);
//int tempx = img.getWidth();
//int tempy = img.getHeight();
int tempx = 100;
int tempy = 100;
//rl.addView(img, x, y);
x += tempx;
if(i%4 == 0){
x = 0;
y += tempy;
}
RelativeLayout.LayoutParams params;
params = new RelativeLayout.LayoutParams(100, 100);
params.leftMargin = x;
params.topMargin = y;
rl.addView(img,params);
}
rl.bringToFront();
}
Gridview
代替RelativeLayout
。
见这个例子: