LayoutInflater を使用します。
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LayoutInflater inflater = this.getLayoutInflater();
LinearLayout v = (LinearLayout)inflater.inflate(R.layout.hello, null);
Button bt1 = (Button)v.findViewById(R.id.btLog);
bt1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
}
}
更新*拡張可能なレイアウト*
public class ExpandablePanel extends LinearLayout {
private final int mHandleId;
private final int mContentId;
private View mHandle;
private View mContent;
private boolean mExpanded = false;
private int mCollapsedHeight = 0;
private int mContentHeight = 0;
private int mAnimationDuration = 0;
private OnExpandListener mListener;
public ExpandablePanel(Context context) {
this(context, null);
}
public ExpandablePanel(Context context, AttributeSet attrs) {
super(context, attrs);
mListener = new DefaultOnExpandListener();
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ExpandablePanel, 0, 0);
// How high the content should be in "collapsed" state
mCollapsedHeight = (int) a.getDimension(R.styleable.ExpandablePanel_collapsedHeight, 0.0f);
// How long the animation should take
mAnimationDuration = a.getInteger(R.styleable.ExpandablePanel_animationDuration, 500);
int handleId = a.getResourceId(R.styleable.ExpandablePanel_handle, 0);
if (handleId == 0) {
throw new IllegalArgumentException(
"The handle attribute is required and must refer "
+ "to a valid child.");
}
int contentId = a.getResourceId(R.styleable.ExpandablePanel_content, 0);
if (contentId == 0) {
throw new IllegalArgumentException("The content attribute is required and must refer to a valid child.");
}
mHandleId = handleId;
mContentId = contentId;
a.recycle();
}
public void setOnExpandListener(OnExpandListener listener) {
mListener = listener;
}
public void setCollapsedHeight( int collapsedHeight ) { mCollapsedHeight = collapsedHeight; android.view.ViewGroup.LayoutParams lp = mContent.getLayoutParams(); lp.height = mCollapsedHeight; mContent.setLayoutParams( lp ); }
public void setAnimationDuration(int animationDuration) {
mAnimationDuration = animationDuration;
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mHandle = findViewById(mHandleId);
if (mHandle == null) {
throw new IllegalArgumentException(
"The handle attribute is must refer to an"
+ " existing child.");
}
mContent = findViewById(mContentId);
if (mContent == null) {
throw new IllegalArgumentException(
"The content attribute must refer to an"
+ " existing child.");
}
android.view.ViewGroup.LayoutParams lp = mContent.getLayoutParams();
lp.height = mCollapsedHeight;
mContent.setLayoutParams(lp);
mHandle.setOnClickListener(new PanelToggler());
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// First, measure how high content wants to be
mContent.measure(widthMeasureSpec, MeasureSpec.UNSPECIFIED);
mContentHeight = mContent.getMeasuredHeight();
if (mContentHeight < mCollapsedHeight) {
mHandle.setVisibility(View.GONE);
} else {
mHandle.setVisibility(View.VISIBLE);
}
// Then let the usual thing happen
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private class PanelToggler implements OnClickListener {
public void onClick(View v) {
Animation a;
if (mExpanded) {
a = new ExpandAnimation(mContentHeight, mCollapsedHeight);
mListener.onCollapse(mHandle, mContent);
} else {
a = new ExpandAnimation(mCollapsedHeight, mContentHeight);
mListener.onExpand(mHandle, mContent);
}
a.setDuration(mAnimationDuration);
if(mContent.getLayoutParams().height == 0) //Need to do this or else the animation will not play if the height is 0
{
android.view.ViewGroup.LayoutParams lp = mContent.getLayoutParams();
lp.height = 1;
mContent.setLayoutParams(lp);
mContent.requestLayout();
}
mContent.startAnimation(a);
mExpanded = !mExpanded;
}
}
private class ExpandAnimation extends Animation {
private final int mStartHeight;
private final int mDeltaHeight;
public ExpandAnimation(int startHeight, int endHeight) {
mStartHeight = startHeight;
mDeltaHeight = endHeight - startHeight;
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
android.view.ViewGroup.LayoutParams lp = mContent.getLayoutParams();
lp.height = (int) (mStartHeight + mDeltaHeight * interpolatedTime);
mContent.setLayoutParams(lp);
}
@Override
public boolean willChangeBounds() {
return true;
}
}
public interface OnExpandListener {
public void onExpand(View handle, View content);
public void onCollapse(View handle, View content);
}
private class DefaultOnExpandListener implements OnExpandListener {
public void onCollapse(View handle, View content) {}
public void onExpand(View handle, View content) {}
}
}
レイアウト:
これを一番上に置きます: xmlns:cl="http://schemas.android.com/res/com.example.androidapp.widgets" Eclipse は、ExpandablePanel で例外をスローするため、常にこのレイアウトでエラーを示します。クラスなので、これらの行を非表示にして、展開可能なレイアウトがどのように表示されるかを確認し、ボタンとテキストの子を設定できます。
<com.example.androidapp.widgets.ExpandablePanel
android:id="@+id/theId"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:collapsedHeight="80dp"
app:content="@+id/value"
app:handle="@+id/expand"
cl:collapsedHeight="50dip"
cl:content="@+id/value"
cl:handle="@+id/expand" >
<TextView
android:id="@id/value"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="hejahdkashfa afsjkhas lf ksajfh as fkjsah asf kfsahkjfas klfajsh flkas klfajsh lasfkl aklfsjh klsa ffhaskljfha dfasfa s safjsfkhasjkf fjakshfjkasf jksfhjkasf sjakfhas kjfa sjkfhakjsfh asjsfhkjashf askjsf sakjfh as fadsfasf af asf asf" />
<Button
android:id="@id/expand"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical|center_horizontal"
android:text="More" />
</com.example.androidapp.widgets.ExpandablePanel>
エキスパンド パネルの設定方法:
// Set expandable panel listener
ExpandablePanel panel = (ExpandablePanel)findViewById(R.id.theId);
panel.setCollapsedHeight(50);
panel.setContentDescription(descricao);
panel.setOnExpandListener(new ExpandablePanel.OnExpandListener() {
public void onCollapse(View handle, View content) {
Button btn = (Button)handle;
btn.setText("More");
}
public void onExpand(View handle, View content) {
Button btn = (Button)handle;
btn.setText("Less");
}
});