Android应用源码之Android 天天动听悬浮歌词源码.zip

package com.yfz.view; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.LinearGradient; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.Shader; import android.graphics.Typeface; import android.graphics.Shader.TileMode; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.WindowManager; import android.widget.TextView; import android.widget.Toast; public class MyTextView extends TextView { private final String TAG = MyTextView.class.getSimpleName(); public static int TOOL_BAR_HIGH = 0; public static WindowManager.LayoutParams params = new WindowManager.LayoutParams(); private float startX; private float startY; private float x; private float y; private String text; WindowManager wm = (WindowManager)getContext().getApplicationContext().getSystemService(getContext().WINDOW_SERVICE); public MyTextView(Context context) { super(context); text = "世上只有妈妈好,有妈的孩子像块宝"; this.setBackgroundColor(Color.argb(90, 150, 150, 150)); handler = new Handler(); handler.post(update); } @Override public boolean onTouchEvent(MotionEvent event) { //触摸点相对于屏幕左上角坐标 x = event.getRawX(); y = event.getRawY() - TOOL_BAR_HIGH; Log.d(TAG, "------X: "+ x +"------Y:" + y); switch(event.getAction()) { case MotionEvent.ACTION_DOWN: startX = event.getX(); startY = event.getY(); break; case MotionEvent.ACTION_MOVE: updatePosition(); break; case MotionEvent.ACTION_UP: updatePosition(); startX = startY = 0; break; } return true; } @Override protected void onDraw(Canvas canvas) { // TODO Auto-generated method stub super.onDraw(canvas); float1 += 0.001f; float2 += 0.001f; if(float2 > 1.0){ float1 = 0.0f; float2 = 0.01f; } this.setText(""); float len = this.getTextSize() * text.length(); Shader shader = new LinearGradient(0, 0, len, 0, new int[] { Color.YELLOW, Color.RED }, new float[]{float1, float2}, TileMode.CLAMP); Paint p = new Paint(); p.setShader(shader); p.setTypeface(Typeface.DEFAULT_BOLD); canvas.drawText(text, 0, 10, p); } private Runnable update = new Runnable() { public void run() { MyTextView.this.update(); handler.postDelayed(update, 5); } }; private void update(){ postInvalidate(); } private float float1 = 0.0f; private float float2 = 0.01f; private Handler handler; //更新浮动窗口位置参数 private void updatePosition(){ // View的当前位置 params.x = (int)( x - startX); params.y = (int) (y - startY); wm.updateViewLayout(this, params); } }