DamakuView.java
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package com.cnlive.goldenline.ui.widget;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Rect;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.cnlive.goldenline.model.DamakuViewinfo;
import java.util.Random;
/**
* Created by Dean.Zhang on 2016-08-24.
*/
public class DamakuView extends RelativeLayout {
private Context mContext;
@NonNull
public BarrageHandler mHandler = new BarrageHandler();
@NonNull
private Random random = new Random(System.currentTimeMillis());
private static final long BARRAGE_GAP_MIN_DURATION = 2000;//两个弹幕的最小间隔时间
private static final long BARRAGE_GAP_MAX_DURATION = 4000;//两个弹幕的最大间隔时间
private int maxSpeed = 10000;//速度，ms
private int minSpeed = 5000;//速度，ms
private int maxSize = 20;//文字大小，dp
private int minSize = 10;//文字大小，dp
private int totalHeight = 0;
private int lineHeight = 0;//每一行弹幕的高度
private int totalLine = 0;//弹幕的行数
@NonNull
private String[] itemText = {"抢沙发咯！！！"};
private int textCount;
// private List<BarrageItem> itemList = new ArrayList<BarrageItem>();
public DamakuView(Context context) {
this(context, null);
}
public DamakuView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DamakuView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context;
init();
}
private void init() {
textCount = itemText.length;
int duration = (int) ((BARRAGE_GAP_MAX_DURATION - BARRAGE_GAP_MIN_DURATION) * Math.random());
mHandler.sendEmptyMessageDelayed(0, duration);
}
@Override
public void onWindowFocusChanged(boolean hasWindowFocus) {
super.onWindowFocusChanged(hasWindowFocus);
totalHeight = getMeasuredHeight();
lineHeight = getLineHeight();
totalLine = totalHeight / lineHeight;
}
/** 获取外部传入的数据 */
public void getData(@NonNull String txt, @Nullable String col, String sz){
Log.i("TSM","接收到的弹幕1"+"-----"+txt+"----"+col+"-----"+sz);
int size=Integer.parseInt(sz);
if (col==null || col.equals("0")){ generateItem(txt,size,255,255,255); }else {
int color=Integer.parseInt(col);
switch (color){
//case 0: generateItem(txt,size,255,255,255); break; //255.255.255
case 1: generateItem(txt,size,255,102,51); break; //255.102.51
case 2: generateItem(txt,size,255,153,1); break; // 255.153.1
case 3: generateItem(txt,size,255,255,0); break; //255.255.0
case 4: generateItem(txt,size,0,255,16); break; //0.255.16
case 5: generateItem(txt,size,0,255,255); break; //0.255.255
case 6: generateItem(txt,size,0,140,238); break; //0.140.238
case 7: generateItem(txt,size,134,0,255); break; //134.0.255
}
}
}
private void generateItem(@NonNull String txt, int size, int R, int G, int B) {
Log.i("TSM","接收到的弹幕2"+"-----"+txt+"----"+size+"-----"+R+"-----"+G+"--------"+B);
DamakuViewinfo item = new DamakuViewinfo();
item.textView = new TextView(mContext);
item.textView.setText(txt);
item.textView.setTextSize(size);
item.textView.setTextColor(Color.rgb(R,G,B));
item.textMeasuredWidth = (int) getTextWidth(item, txt, size);
item.moveSpeed = (int) (minSpeed + (maxSpeed - minSpeed) * Math.random());
if (totalLine == 0) {
totalHeight = getMeasuredHeight();
lineHeight = getLineHeight();
totalLine = totalHeight / lineHeight;
}
item.verticalPos = random.nextInt(totalLine) * lineHeight;
// itemList.add(item);
showBarrageItem(item);
}
private void showBarrageItem(@NonNull final DamakuViewinfo item) {
int leftMargin = this.getRight() - this.getLeft() - this.getPaddingLeft();
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.topMargin = item.verticalPos;
this.addView(item.textView, params);
Animation anim = generateTranslateAnim(item, leftMargin);
anim.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
item.textView.clearAnimation();
DamakuView.this.removeView(item.textView);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
item.textView.startAnimation(anim);
}
@NonNull
private TranslateAnimation generateTranslateAnim(@NonNull DamakuViewinfo item, int leftMargin) {
TranslateAnimation anim = new TranslateAnimation(leftMargin, -item.textMeasuredWidth, 0, 0);
anim.setDuration(item.moveSpeed);
anim.setInterpolator(new AccelerateDecelerateInterpolator());
anim.setFillAfter(true);
return anim;
}
/**
* 计算TextView中字符串的长度
*
* @param text 要计算的字符串
* @param Size 字体大小
* @return TextView中字符串的长度
*/
public float getTextWidth(@NonNull DamakuViewinfo item, @NonNull String text, float Size) {
Rect bounds = new Rect();
TextPaint paint;
paint = item.textView.getPaint();
paint.getTextBounds(text, 0, text.length(), bounds);
return bounds.width();
}
/**
* 获得每一行弹幕的最大高度
*
* @return
*/
private int getLineHeight() {
DamakuViewinfo item = new DamakuViewinfo();
String tx = itemText[0];
item.textView = new TextView(mContext);
item.textView.setText(tx);
item.textView.setTextSize(maxSize);
Rect bounds = new Rect();
TextPaint paint;
paint = item.textView.getPaint();
paint.getTextBounds(tx, 0, tx.length(), bounds);
return bounds.height();
}
class BarrageHandler extends Handler {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
//generateItem(itemText[(int) (Math.random() * textCount)],(int) (minSize + (maxSize - minSize) * Math.random()),255,255,255); ////random.nextInt(R), random.nextInt(G), random.nextInt(B))
//每个弹幕产生的间隔时间随机
int duration = (int) ((BARRAGE_GAP_MAX_DURATION - BARRAGE_GAP_MIN_DURATION) * Math.random());
this.sendEmptyMessageDelayed(0, duration);
}
}
}