android如何写一个投票或是表达观点的界面
浏览数：66 /
时间：2015年06月11日
先上图:
把这些表示观点的view放在一个LinearLayout里:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/repost_vote_tag_list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="gone">
</LinearLayout>每个Item可以这样来实现:
public class KXTagWidget extends TextView{
String mTagName = "";
/** colors */
int mBgColor = Color.WHITE;
int mPressedBgColor = Color.WHITE;
int mTextColor = Color.WHITE;
int mPressedTextColor = Color.BLACK;
public KXTagWidget(Context context) {
super(context);
setClickable(true);
}
public KXTagWidget(Context context, AttributeSet attrs) {
super(context, attrs);
setClickable(true);
}
public KXTagWidget(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setClickable(true);
}
public void setName(String tagName){
if(tagName != null){
mTagName = tagName;
this.setText(mTagName);
}
}
public void setBgColor(int bgColor, int pressedBgColor){
mBgColor = bgColor;
mPressedBgColor = pressedBgColor;
this.setBackgroundColor(bgColor);
// this.set
}
public int getmPressedBgColor() {
return mPressedBgColor;
}
public void setmPressedBgColor(int mPressedBgColor) {
this.mPressedBgColor = mPressedBgColor;
}
public int getmPressedTextColor() {
return mPressedTextColor;
}
public void setmPressedTextColor(int mPressedTextColor) {
this.mPressedTextColor = mPressedTextColor;
}
public int getmBgColor() {
return mBgColor;
}
public void setmBgColor(int mBgColor) {
this.mBgColor = mBgColor;
}
public int getmTextColor() {
return mTextColor;
}
public void setmTextColor(int mTextColor) {
this.mTextColor = mTextColor;
}
public void setTextColor(int textColor, int pressedTextColor){
mTextColor = textColor;
mPressedTextColor = pressedTextColor;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//加画边框
Paint paint = new Paint();
paint.setColor(this.mBgColor);
int width = getWidth();
int height = getHeight();
canvas.drawLine(0, 0, width - 1, 0, paint);
canvas.drawLine(width - 1, 0, width - 1, height , paint);
canvas.drawLine(width - 1, height -1, 0, height - 1, paint);
canvas.drawLine(0, height -1 , 0, 0, paint);
}
public int getMesuredWidth() {
int mesuredWidth = 0;
Paint p = this.getPaint();
float textWidth = p.measureText(mTagName);
mesuredWidth = (int)textWidth + this.getCompoundPaddingLeft()
+ this.getCompoundPaddingRight();
return mesuredWidth;
}
}
Activity的实现:
private static final int VOTE_BAR_IMAGE_NUM = 9;
private int mVoteBarImage[] = new int[VOTE_BAR_IMAGE_NUM];
private HashMap<String, View> mVoteControlMap = new HashMap<String, View>();
private int mTagBgColor[] = new int[14];
/** tag touch listener */
private TagOnTouchListener mTagOnTouchListener = null;
/** tag click listener */
private TagOnClickListener mTagOnClickListener = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initTagBgColor();
mTagList.add("导致反对微软");
mTagList.add("声浪再次掀起的");
mTagList.add("声势");
mTagList.add("XXX");
mTagList.add("YYYYYY");
mTagList.add("XXXXXXXXXXXXXX");
mTagList.add("ZZZZZZZZ");
mTagList.add("其中一些中小规模的公司甚至经常低于国家标准甚至不给赔偿");
mTagList.add("按照国家劳动法有关规定");
mTagList.add("即以在诺基亚公司");
mTagList.add("国家");
constructViews();
}
private void constructViews() {
// total number of votes
String text = "一共有"+String.valueOf(11)+"项";
TextView view = (TextView) this
.findViewById(R.id.repost_vote_total_num_des);
view.setText(text);
// friend's opinion label
TextView view2 = (TextView) this
.findViewById(R.id.repost_vote_friend_opinion_label);
View answerlistView = this.findViewById(R.id.repost_vote_anwser_list);
View taglistView = this.findViewById(R.id.repost_vote_tag_list);
View inputView = this.findViewById(R.id.repost_vote_input_layout);
answerlistView.setVisibility(View.GONE);
taglistView.setVisibility(View.VISIBLE);
inputView.setVisibility(View.VISIBLE);
// tag list view
constructTagListView();
// result list view
// constructResultListView();
}
private void initTagBgColor() {
int i;
for (i = 0; i < 7; ++i) {
int r = 231 - i * 18;
int g = 85 - i * 3;
int b = 85 - i * 3;
mTagBgColor[i] = Color.rgb(r, g, b);
}
for (i = 7; i < 14; ++i) {
int c = 118 + (i - 7) * 14;
mTagBgColor[i] = Color.rgb(c, c, c);
}
}
private ArrayList<String> mTagList = new ArrayList<String>();
private void constructTagListView() {
LinearLayout parent = (LinearLayout) findViewById(R.id.repost_vote_tag_list);
if (mTagList == null) {
parent.setVisibility(View.GONE);
return;
}
if (mTagList.size() == 0) {
parent.setVisibility(View.GONE);
return;
}
parent.removeAllViews();
int screenWidth = getWindowManager().getDefaultDisplay().getWidth();
float totalWidth = screenWidth - 25.0f;
int tagTotalNum = Math.min(mTagList.size(), 15);
/** 可放TAG的剩余空间 */
float surplus = totalWidth;
LinearLayout oneLine = null;
oneLine = new LinearLayout(this);
LayoutParams params = new LayoutParams();
params.width = LayoutParams.FILL_PARENT;
params.height = LayoutParams.WRAP_CONTENT;
params.bottomMargin = 1;
oneLine.setLayoutParams(params);
String tagName = "";
for (int i = 0; i < tagTotalNum; i++) {
KXTagWidget oneTag = (KXTagWidget) getLayoutInflater().inflate(
R.layout.kx_widget_view, null);
tagName = mTagList.get(i);
oneTag.setName(tagName);
oneTag.setTag(i);
oneTag.setBgColor(selectTagBgColor(i), Color.WHITE);
oneTag.setOnClickListener(this.mTagOnClickListener);
this.mTagOnClickListener = new TagOnClickListener();
this.mTagOnTouchListener = new TagOnTouchListener();
oneTag.setOnTouchListener(this.mTagOnTouchListener);
oneTag.setOnClickListener(mTagOnClickListener);
float viewWidth = oneTag.getMesuredWidth();
if (surplus > viewWidth) {// 如果surplus剩余可画空间能容得下oneTag，则在该行放下这个tag并重新计算剩余可画空间surplus
oneLine.addView(oneTag);
surplus -= viewWidth;
} else {// 如果容不下就换一行，并把上一行add进去，初始化surplus
parent.addView(oneLine);
surplus = totalWidth;
oneLine = new LinearLayout(this);
oneLine.setLayoutParams(params);
oneLine.addView(oneTag);
surplus -= viewWidth;
}
}
if (null != oneLine) {
parent.addView(oneLine);
}
}
private int selectTagBgColor(int index) {
if (index < mTagBgColor.length) {
return mTagBgColor[index];
} else {
return mTagBgColor[mTagBgColor.length - 1];
}
}
private int selectVoteBarImage(int index) {
int i = index % VOTE_BAR_IMAGE_NUM;
return mVoteBarImage[i];
}
private void initVoteBarImage() {
mVoteBarImage[0] = R.drawable.votec1;
mVoteBarImage[1] = R.drawable.votec2;
mVoteBarImage[2] = R.drawable.votec3;
mVoteBarImage[3] = R.drawable.votec4;
mVoteBarImage[4] = R.drawable.votec5;
mVoteBarImage[5] = R.drawable.votec6;
mVoteBarImage[6] = R.drawable.votec7;
mVoteBarImage[7] = R.drawable.votec8;
mVoteBarImage[8] = R.drawable.votec9;
}
private class TagOnTouchListener implements OnTouchListener {
@Override
public boolean onTouch(View v, MotionEvent event) {
KXTagWidget tagView = (KXTagWidget) v;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
CharSequence tagName = tagView.getText();
tagView.setTextColor(tagView.getmPressedTextColor());
tagView.setBackgroundColor(tagView.getmPressedBgColor());
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_OUTSIDE:
case MotionEvent.ACTION_CANCEL: {
tagView.setTextColor(tagView.getmTextColor());
tagView.setBackgroundColor(tagView.getmBgColor());
}
break;
default:
break;
}
return false;
}
}
private class TagOnClickListener implements OnClickListener {
@Override
public void onClick(View view) {
Integer tagIndex = (Integer) view.getTag();
String name = mTagList.get(tagIndex);
Toast.makeText(MainActivity.this, name, Toast.LENGTH_LONG).show();
}
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