AnyChartView在活动销毁时发生内存泄漏

Question

我正在使用LeakCanary来检测内存泄漏，我是新手。当我的活动被破坏时，它会给我一个泄漏报告。我也不熟悉任何图表库。我如何解决这个问题？以下是我的活动代码和泄漏金丝雀的堆栈。如果可能的话，你能不能向我详细说明如何阅读《泄密者》。

public class AnalyticsActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_analytics);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
getWindow().setStatusBarColor(Color.WHITE);
}
AnyChartView anyChartView = findViewById(R.id.any_chart_view);
anyChartView.setProgressBar(findViewById(R.id.progress_bar));
Cartesian cartesian = AnyChart.column();
List<DataEntry> data = new ArrayList<>();
data.add(new ValueDataEntry("Rouge", 80540));
data.add(new ValueDataEntry("Foundation", 94190));
data.add(new ValueDataEntry("Mascara", 102610));
data.add(new ValueDataEntry("Lip gloss", 110430));
data.add(new ValueDataEntry("Lipstick", 128000));
data.add(new ValueDataEntry("Nail polish", 143760));
data.add(new ValueDataEntry("Eyebrow pencil", 170670));
data.add(new ValueDataEntry("Eyeliner", 213210));
data.add(new ValueDataEntry("Eyeshadows", 249980));
Column column = cartesian.column(data);
column.tooltip()
.titleFormat("{%X}")
.position(Position.CENTER_BOTTOM)
.anchor(Anchor.CENTER_BOTTOM)
.offsetX(0d)
.offsetY(5d)
.format("${%Value}{groupsSeparator: }");
cartesian.animation(true);
cartesian.title("Top 10 Cosmetic Products by Revenue");
cartesian.yScale().minimum(0d);
cartesian.yAxis(0).labels().format("${%Value}{groupsSeparator: }");
cartesian.tooltip().positionMode(TooltipPositionMode.POINT);
cartesian.interactivity().hoverMode(HoverMode.BY_X);
cartesian.xAxis(0).title("Product");
cartesian.yAxis(0).title("Revenue");
anyChartView.setChart(cartesian);
}
}

┬───
│ GC Root: System class
│
├─ com.anychart.APIlib class
│    Leaking: NO (a class is never leaking)
│    ↓ static APIlib.instance
│                    ~~~~~~~~
├─ com.anychart.APIlib instance
│    Leaking: UNKNOWN
│    ↓ APIlib.anyChartView
│             ~~~~~~~~~~~~
├─ com.anychart.AnyChartView instance
│    Leaking: YES (View.mContext references a destroyed activity)
│    mContext instance of com.dreamakers.clustore.clustorestore.Activity.AnalyticsActivity with mDestroyed = true
│    View#mParent is set
│    View#mAttachInfo is null (view detached)
│    View.mID = R.id.any_chart_view
│    View.mWindowAttachCount = 1
│    ↓ AnyChartView.mContext
╰→ com.dreamakers.clustore.clustorestore.Activity.AnalyticsActivity instance
​     Leaking: YES (ObjectWatcher was watching this because com.dreamakers.clustore.clustorestore.Activity.AnalyticsActivity received Activity#onDestroy() callback and Activity#mDestroyed is true)
​     key = 7ac56641-d049-41a3-8cb8-0a2cae7cc320
​     watchDurationMillis = 8099
​     retainedDurationMillis = 3098

Answer 1

AnyChart Android库存在内存泄漏。我在这里提交了一个问题：https://github.com/AnyChart/AnyChart-Android/issues/190

在这个问题得到解决之前，你可以用这种方式解决：

public void onDestroy() {
super.onDestroy();
APIlib.setActiveAnyChartView(null);
}

Answer 2

我认为最简单的方法是将AnyChartView分配给全局变量，然后在活动的onDestroy()方法中只为其分配null：

public void onDestroy() {
anyChartView = null;
super.onDestroy()
}

这里的情况是AnyChartView持有对活动上下文的引用，这就是为什么由于库存储此引用的方式，"活动"不能被轻易地垃圾收集的原因。