如下效果：
实现：
1，xml文件
<LinearLayout
android:id="@+id/ll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"/>2，自定义的ViewGroup
public class MyViewGroup extends ViewGroup {
private final static String TAG = "MyViewGroup";
private final static int VIEW_MARGIN = 2;
public MyViewGroup(Context context) {
super(context);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.d(TAG, "widthMeasureSpec = " + widthMeasureSpec
+ " heightMeasureSpec" + heightMeasureSpec);
for (int index = 0; index < getChildCount(); index++) {
final View child = getChildAt(index);
// measure
child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {
Log.d(TAG, "changed = " + arg0 + " left = " + arg1 + " top = " + arg2
+ " right = " + arg3 + " botom = " + arg4);
final int count = getChildCount();
int row = 0;// which row lay you view relative to parent
int lengthX = arg1; // right position of child relative to parent
int lengthY = arg2; // bottom position of child relative to parent
for (int i = 0; i < count; i++) {
final View child = this.getChildAt(i);
int width = child.getMeasuredWidth();
int height = child.getMeasuredHeight();
lengthX += width + VIEW_MARGIN;
lengthY = row * (height + VIEW_MARGIN) + VIEW_MARGIN + height
+ arg2;
// if it can't drawing on a same line , skip to next line
if (lengthX > arg3) {
lengthX = width + VIEW_MARGIN + arg1;
row++;
lengthY = row * (height + VIEW_MARGIN) + VIEW_MARGIN + height
+ arg2;
}
child.layout(lengthX - width, lengthY - height, lengthX, lengthY);
}
}
}3, MainActivity中添加
public class MainActivity extends AppCompatActivity {
private LinearLayout ll;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MyViewGroup myViewGroup = new MyViewGroup(this);
String[] str = new String[]{"aaaaa", "aaa", "aaaafgga", "aaaaafsfsfasfaasf", "aaaaa", "aaaaa", "aaaaqweqweqweqweqwea", "aaaaa", "qwewqeqweqwe", "aaaaa"};
for (int i = 0; i < str.length; i++) {
Button button = new Button(this);
button.setText(str[i]);
myViewGroup.addView(button);
}
ll = findViewById(R.id.ll);
ll.addView(myViewGroup);
}
}