绘制优化

<style name="Theme.Light">
    <item name="isLightTheme">true</item>
    <item name="windowBackground">@drawable/screen_background_selector_light</item>
    ...
</style>
 

<item name="android:windowBackground">@android:color/transparent</item>
<!-- 或者 -->
<item name="android:windowBackground">@null</item>
 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    android:orientation="vertical">
 
    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv_apps"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="visible"/>
 
</LinearLayout>
 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/white"
    android:orientation="horizontal"
    android:padding="@dimen/mid_dp">
 
    <ImageView
        android:id="@+id/iv_app_icon"
        android:layout_width="40dp"
        android:layout_height="40dp"
        tools:src="@mipmap/ic_launcher"/>
 
    <TextView
        android:id="@+id/tv_app_label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_marginLeft="@dimen/mid_dp"
        android:textColor="@color/text_gray_main"
        android:textSize="@dimen/mid_sp"
        tools:text="test"/>
</LinearLayout>
 

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTim
    final int height = getHeight();
    final boolean drawingContent = isContentView(child);
    int clipLeft = 0, clipRight = getWidth();
    final int restoreCount = canvas.save();
    if (drawingContent) {
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View v = getChildAt(i);
            if (v == child || v.getVisibility() != VISIBLE
                    || !hasOpaqueBackground(v) || !isDrawerView(v)
                    || v.getHeight() < height) {
                continue;
            }
            if (checkDrawerViewAbsoluteGravity(v, Gravity.LEFT)) {
                final int vright = v.getRight();
                if (vright > clipLeft) clipLeft = vright;
            } else {
                final int vleft = v.getLeft();
                if (vleft < clipRight) clipRight = vleft;
            }
        }
        canvas.clipRect(clipLeft, 0, clipRight, getHeight());
    }
    ......                       
}
 

canvas.save();
canvas.clipPath(mCirclePath);
canvas.drawBitmap(mBitmap);
canvas.restore();
可以用如下代替：
// one time init:
mPaint.setShader(new BitmapShader(mBitmap, TileMode.CLAMP, TileMode.CLAMP));
// at draw time:
canvas.drawPath(mCirclePath, mPaint);
 

Choreographer.getInstance().postFrameCallback(new Choreographer.FrameCallback() {
            @Override
            public void doFrame(long l) {
 
            }
});
 

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    private void getFPS() {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
            return;
        }
        Choreographer.getInstance().postFrameCallback(new Choreographer.FrameCallback() {
            @Override
            public void doFrame(long frameTimeNanos) {
                if (mStartFrameTime == 0) {
                    mStartFrameTime = frameTimeNanos;
                }
                long interval = frameTimeNanos - mStartFrameTime;
                //判断间隔时间是否超过所设的值，超过就开始计算fps值
                if (interval > MONITOR_INTERVAL_NANOS) {
                    //fps 为用间隔时间除以在间隔时间发生的次数
                    double fps = (((double) (mFrameCount * 1000L * 1000L)) / interval) * MAX_INTERVAL;
                    LogUtils.i("fps="+fps);
                    mFrameCount = 0;
                    mStartFrameTime = 0;
                } else {
                    ++mFrameCount;
                }
 
                Choreographer.getInstance().postFrameCallback(this);
            }
        });
    }
 

    LayoutInflater.from(this).setFactory2(new LayoutInflater.Factory2() {
        @Override
        public View onCreateView(View parent, String name, Context context, AttributeSet attrs) {
            // 调用 AppCompatDelegate 的createView方法
            getDelegate().createView(parent, name, context, attrs);
            // 再来执行我们的定制化操作
            return null;
        }
        @Override
        public View onCreateView(String name, Context context, AttributeSet attrs) {
            return null;
        }
    });
 
 

        LayoutInflaterCompat.setFactory2(getLayoutInflater(), new LayoutInflater.Factory2() {
            @Override
            public View onCreateView(View parent, String name, Context context, AttributeSet attrs) {
 
                //替换项目中的TextView，生成自定义文本
                if (TextUtils.equals(name, "TextView")) {
                    // 生成自定义TextView
                }
                //获取控件的加载耗时
                long time = System.currentTimeMillis();
                View view = getDelegate().createView(parent, name, context, attrs);
                LogUtils.i(name + " cost " + (System.currentTimeMillis() - time));
                return view;
            }
 
            @Override
            public View onCreateView(String name, Context context, AttributeSet attrs) {
                return null;
            }
        });
 

        new AsyncLayoutInflater(MainActivity.this).inflate(R.layout.activity_main, null, new AsyncLayoutInflater.OnInflateFinishedListener() {
            @Override
            public void onInflateFinished(@NonNull View view, int i, @Nullable ViewGroup viewGroup) {
                setContentView(view);
                mRecyclerView = findViewById(R.id.recycler_view);
                mRecyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
                mRecyclerView.setAdapter(mNewsAdapter);
                mNewsAdapter.setOnFeedShowCallBack(MainActivity.this);
            }
        });
 

@Proxy("i")
@TargetClass("android.util.Log")
public static int i(String tag,String msg){
    msg = msg+ "lancet";
    return (int)Origin.call();
}
 

Origin.call/callThrowOne/callThrowTwo/callThrowThree()
Origin.callVoid/callVoidThrowOne/callVoidThrowTwo/callVoidThrowThree()
 

public class ActivityRecord {
 
    public long mOnCreateTime;
    public long mOnWindowsFocusChangedTime;
 
}
public class ActivityHooker {
 
    public static ActivityRecord sActivityRecord;
 
    static {
        sActivityRecord = new ActivityRecord();
    }
 
    public static String trace;
//mayCreateSuper 当目标函数不存在进行创建
    @Insert(value = "onCreate",mayCreateSuper = true)
    @TargetClass(value = "android.support.v7.app.AppCompatActivity",scope = Scope.ALL)
    protected void onCreate(Bundle savedInstanceState) {
        sActivityRecord.mOnCreateTime = System.currentTimeMillis();
        Origin.callVoid();
    }
//scope = Scope.ALL 作用范围
    @Insert(value = "onWindowFocusChanged",mayCreateSuper = true)
    @TargetClass(value = "android.support.v7.app.AppCompatActivity",scope = Scope.ALL)
    public void onWindowFocusChanged(boolean hasFocus) {
        sActivityRecord.mOnWindowsFocusChangedTime = System.currentTimeMillis();
        LogUtils.i("onWindowFocusChanged cost "+(sActivityRecord.mOnWindowsFocusChangedTime - sActivityRecord.mOnCreateTime));
        Origin.callVoid();
    }
 
 
    public static long sStartTime = 0;
 
    @Insert(value = "acquire")
    @TargetClass(value = "com.optimize.performance.wakelock.WakeLockUtils",scope = Scope.SELF)
    public static void acquire(Context context){
        trace = Log.getStackTraceString(new Throwable());
        sStartTime = System.currentTimeMillis();
        Origin.callVoid();
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                WakeLockUtils.release();
            }
        },1000);
    }
 
    @Insert(value = "release")
    @TargetClass(value = "com.optimize.performance.wakelock.WakeLockUtils",scope = Scope.SELF)
    public static void release(){
        LogUtils.i("PowerManager "+(System.currentTimeMillis() - sStartTime)+"/n"+trace);
        Origin.callVoid();
    }
 
 
    public static long runTime = 0;
 
    @Insert(value = "run")
    @TargetClass(value = "java.lang.Runnable",scope = Scope.ALL)
    public void run(){
        runTime = System.currentTimeMillis();
        Origin.callVoid();
        LogUtils.i("runTime "+(System.currentTimeMillis() - runTime));
    }
 
//对Log.i进行hook 在后面加ActivityHooker后缀，对系统方法hook，TargetClass Hook 那个类的那个方法
    @Proxy("i")
    @TargetClass("android.util.Log")
    public static int i(String tag, String msg) {
        msg = msg + "ActivityHooker";
        return (int) Origin.call();
    }
 
}