android:自定义viewgroup,并实现滚动条和换行

重点在RecipientShower#onLayout(boolean changed, int left, int top, int right, int bottom) {}

//RecipientShowHelper.java

public class RecipientShowHelper {

int mRow;

int mChildHeight;

LinearLayout.LayoutParams mLayoutParams;

public RecipientShowHelper() {

}

public void mesure(ViewGroup vg, int margin, boolean isLimit2Row, int viewWidth) {

final int count = vg.getChildCount();

mRow = 0;// which row lay you view relative to parent

int lengthX = 0; // right position of child relative to parent

mChildHeight = 0; // the height of child

for (int i = 0; i < count; i++) {

final View child = vg.getChildAt(i);

child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);

int width = child.getMeasuredWidth();

mChildHeight = child.getMeasuredHeight();

lengthX += width + margin;

// if it can't drawing on a same line , skip to next line

if (lengthX > viewWidth) {

lengthX = width + margin + 0;

mRow++;

}

}

if (isLimit2Row) {

if (mRow >= 1) {

mLayoutParams = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.FILL_PARENT, (2 * mChildHeight + margin * 4));

} else {

mLayoutParams = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.FILL_PARENT, (mChildHeight + margin * 2));

}

}

}

public static void layout(int left, int top, int right, int bottom,

ViewGroup vg, int margin) {

final int count = vg.getChildCount();

int row = 0;// which row lay you view relative to parent

int lengthX = left; // right position of child relative to parent

int lengthY = top; // bottom position of child relative to parent

for (int i = 0; i < count; i++) {

final View child = vg.getChildAt(i);

int width = child.getMeasuredWidth();

int height = child.getMeasuredHeight();

lengthX += width + margin;

lengthY = row * (height + margin) + margin + height + top;

// if it can't drawing on a same line , skip to next line

if (lengthX > right) {

lengthX = width + margin + left;

row++;

lengthY = row * (height + margin) + margin + height + top;

}

child.layout(lengthX - width, lengthY - height, lengthX, lengthY);

}

}

public int getRow() {

return mRow;

}

public int getChildHeight() {

return mChildHeight;

}

public LinearLayout.LayoutParams getLayoutParams() {

return mLayoutParams;

}

}

//RecipientShower.java

public class RecipientShower extends ViewGroup {

private final static String TAG = "RecipientShower";

private static final String TEL = "tel";

private int mViewWidth = 200;

private float mDensity = 1.0f;

private ScrollView mScrollView;

private Contact mContact;

private ContactList mContactListRecipient;

private ContactList mContactListRecipientCC;

protected SetTheOtherRecioientEditorListener mSetTextListener;

public static final int RECEPIENT_TYPE_NORMAL = 0;

public static final int RECEPIENT_TYPE_RECENT = 1;

public static final int RECEPIENT_TYPE_CC = 2;

public final static int VIEW_MARGIN = 4;

private int mTextView_id = -1;

private boolean isNewCompose = true;

private int mRow = -1;

private int mChildHeight = -1;

private RecipientShowHelper mShowHelper = new RecipientShowHelper();

public RecipientShower(Context context) {

super(context);

}

public RecipientShower(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

public RecipientShower(Context context, AttributeSet attrs) {

super(context, attrs);

}

public void initViewSize(Activity activity) {

DisplayMetrics metric = new DisplayMetrics();

activity.getWindowManager().getDefaultDisplay().getMetrics(metric);

mViewWidth = metric.widthPixels - 10;

mDensity = metric.density;

}

public void setViewWidth(int width) {

this.mViewWidth = width;

}

public void setmScrollView(ScrollView mScrollView) {

this.mScrollView = mScrollView;

}

public void setmDensity(float mDensity) {

this.mDensity = mDensity;

}

public void setmContext(Context mContext) {

this.mContext = mContext;

}

public void setmSetTextListener(SetTheOtherRecioientEditorListener mSetTextListener) {

this.mSetTextListener = mSetTextListener;

}

public boolean isNewCompose() {

return isNewCompose;

}

public void setNewCompose(boolean isNewCompose) {

this.isNewCompose = isNewCompose;

}

@Override

protected void onFinishInflate() {

super.onFinishInflate();

}

public void removeAllViews() {

super.removeAllViews();

mContactListRecipient.clear();

mContactListRecipientCC.clear();

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

if (!isNewCompose) {

getScrollLayoutParams();

}

setMeasuredDimension(mViewWidth, ((mRow + 1) * mChildHeight + VIEW_MARGIN * (mRow + 1) * 2));

}

@Override

protected void onLayout(boolean changed, int left, int top, int right, int bottom) {

RecipientShowHelper.layout(left, top, right, bottom, this, VIEW_MARGIN);

if (mScrollView != null) {

mScrollView.scrollTo(0, getHeight());

}

}

public void addTextViewChild(int recipientType, Contact contact) {

Paint paint = new Paint();

String text = contact.getName();

int background;

int textview_id;

if (recipientType == RECEPIENT_TYPE_NORMAL) {

background = R.drawable.pressed_span_bg;

mContactListRecipient.add(contact);

textview_id = mContactListRecipient.size();

} else {

background = R.drawable.pressed_span_cc_bg;

text = "CC:" + text;

mContactListRecipientCC.add(contact);

textview_id = mContactListRecipientCC.size() * -1;

}

paint.setTextSize(16.0f);

int width = (int) (paint.measureText(text) * mDensity);

TextView tv = new TextView(mContext);

tv.setId(textview_id);

tv.setTextSize(16.0f);

tv.setText(text);

tv.setBackgroundResource(background);

// tv.setWidth(width);

tv.setHeight(mContext.getResources().getDimensionPixelSize(R.dimen.span_button_height));

tv.setSingleLine(true);

/*

* if (isLandscape()) { tv.setMaxWidth((int)

* getResources().getDimension(

* R.dimen.recipient_editor_span_width_land)); } else {

* tv.setMaxWidth((int)

* getResources().getDimension(R.dimen.recipient_editor_span_width_port

* )); }

*/

tv.setMaxWidth(mViewWidth - VIEW_MARGIN);

tv.setClickable(true);

tv.setOnClickListener(onClickListener);

addView(tv);

}

public void reAddTextViewChild() {

final int count = getChildCount();

for (int index = 0; index < count; index++) {

final View child = this.getChildAt(index);

String text;

int background;

Contact contact;

int textview_id = child.getId();

if (textview_id > 0) {

background = R.drawable.pressed_span_bg;

contact = mContactListRecipient.get(textview_id - 1);

text = contact.getName();

} else {

background = R.drawable.pressed_span_cc_bg;

contact = mContactListRecipientCC.get((textview_id * -1) - 1);

text = "CC:" + contact.getName();

}

TextView tv = new TextView(mContext);

tv.setId(child.getId());

tv.setTextSize(16.0f);

tv.setText(text);

tv.setBackgroundResource(background);

tv.setHeight(mContext.getResources().getDimensionPixelSize(R.dimen.span_button_height));

tv.setSingleLine(true);

tv.setMaxWidth(mViewWidth - VIEW_MARGIN);

tv.setClickable(true);

tv.setOnClickListener(onClickListener);

removeViewAt(index);

addView(tv, index);

}

}

public LinearLayout.LayoutParams getScrollLayoutParams() {

mShowHelper.mesure(this, VIEW_MARGIN, isNewCompose, mViewWidth);

mRow = mShowHelper.getRow();

mChildHeight = mShowHelper.getChildHeight();

return mShowHelper.getLayoutParams();

}

public interface SetTheOtherRecioientEditorListener {

/**

* before edit the number,move the old number to

* mRecipientsEditor_Orginal.

*

* @param number

*/

void setTheOtherRecipientEditorText(String number);

/**

* If the contact is exist in the mNotInDbRecipientCCMap or

* mInDbRecipientCCMap on new compose message return true,else return

* false.

*

* @param contact

* @return

*/

boolean isExistInRecipientCCMap_New_Message(Contact contact);

/**

* synchronized the Contactlist in RecipientsEditor.

*/

void syncContactList(ContactList contactListRecipient, ContactList contactListRecipientCC);

}

}

<!--布局文件-->

<ScrollView

android:id="@+id/my_scrollview"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_weight="1"

android:fadingEdge="none">

<com.android.mms.thundersoft.ui.RecipientShower

android:id="@+id/recipient_shower"

android:layout_width="match_parent"

android:layout_height="wrap_content"

/>

</ScrollView>