问题描述

achartengine内存泄露

  protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            setContentView(R.layout.activity_oxy_chat);
            back = (RelativeLayout) findViewById(R.id.activity_oxy_chat_back);
            chatLayout = (LinearLayout) findViewById(R.id.oxy_chat);
            back.setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View v) {
                            startActivity(new Intent(OxyLineChatActivity.this,
                                            DeviceOptActivity.class));
                            finish();
                    }
            });
            initView();
            // chatLayout.setLayoutParams(new
            // LayoutParams(LayoutParams.MATCH_PARENT,
            // // LayoutParams.MATCH_PARENT));
            // chatLayout.addView(view, new LayoutParams(LayoutParams.MATCH_PARENT,
            // LayoutParams.MATCH_PARENT));

    }

    @Override
    protected void onResume() {
            super.onResume();
            if (view == null) {
                    view = ChartFactory.getLineChartView(this,_
                                    buildDataset(titles, x, values), renderer);
                    view.setBackgroundColor(Color.WHITE);
                    // enable the chart click events
                    chatLayout.addView(view, new LayoutParams(LayoutParams.FILL_PARENT,
                                    LayoutParams.FILL_PARENT));
            } else {
                    ((GraphicalView) view).repaint();
            }

    }

    public void initView() {
            titles = new String[] { "Crete", "Corfu", "Thassos", "Skiathos" };
            x = new ArrayList<double[]>();
            for (int i = 0; i < titles.length; i++) {
                    x.add(new double[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 });
            }
            values = new ArrayList<double[]>();
            values.add(new double[] { 12.3, 12.5, 13.8, 16.8, 20.4, 24.4, 26.4,
                            26.1, 23.6, 20.3, 17.2, 13.9 });
            values.add(new double[] { 10, 10, 12, 15, 20, 24, 26, 26, 23, 18, 14,
                            11 });
            values.add(new double[] { 5, 5.3, 8, 12, 17, 22, 24.2, 24, 19, 15, 9, 6 });
            values.add(new double[] { 9, 10, 11, 15, 19, 23, 26, 25, 22, 18, 13, 10 });
            // 鐐圭殑鏍峰紡
            int[] colors = new int[] { Color.BLUE, Color.GREEN, Color.CYAN,
                            Color.YELLOW };
            PointStyle[] styles = new PointStyle[] { PointStyle.CIRCLE,
                            PointStyle.DIAMOND, PointStyle.TRIANGLE, PointStyle.SQUARE };

            renderer = buildRenderer(colors, styles);
            int length = renderer.getSeriesRendererCount();
            // 鐐规槸绌哄績杩樻槸瀹炲績
            for (int i = 0; i < length; i++) {
                    ((XYSeriesRenderer) renderer.getSeriesRendererAt(i))
                                    .setFillPoints(true);
            }
            setChartSettings(renderer, "Average temperature", "Month",
                            "Temperature", 0.5, 12.5, -10, 40, Color.LTGRAY, Color.LTGRAY);
            // 杞翠笂鏁板瓧鐨勬暟閲?
            renderer.setXLabels(12);
            renderer.setYLabels(10);
            // 鏄?惁鏄剧ず缃戞牸
            renderer.setShowGrid(true);
            // x鎴杫杞翠笂鏁板瓧鐨勬柟鍚戯紝鐩稿弽鐨勩??
            renderer.setXLabelsAlign(Align.RIGHT);
            renderer.setYLabelsAlign(Align.RIGHT);

            // 缂╂斁鏁堟灉
            renderer.setZoomButtonsVisible(true);
            renderer.setPanLimits(new double[] { -10, 20, -10, 40 });
            renderer.setZoomLimits(new double[] { -10, 20, -10, 40 });

            // 鍥捐〃閮ㄥ垎鐨勮儗鏅??鑹?
            // renderer.setApplyBackgroundColor(true);// 璁剧疆鏄?惁鏄剧ず鑳屾櫙鑹?
            // renderer.setBackgroundColor(Color.WHITE);
            // renderer.setBackgroundColor(Color.parseColor("#ffffff"));
            // renderer.setApplyBackgroundColor(true);
            // 鍥捐〃涓庡睆骞曞洓杈圭殑闂磋窛棰滆壊
            renderer.setMarginsColor(Color.WHITE);
    }

    private XYMultipleSeriesRenderer buildRenderer(int[] colors,
                    PointStyle[] styles) {
            XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
            setRenderer(renderer, colors, styles);
            return renderer;
    }

    private void setRenderer(XYMultipleSeriesRenderer renderer, int[] colors,
                    PointStyle[] styles) {
            renderer.setAxisTitleTextSize(16);
            renderer.setChartTitleTextSize(20);
            renderer.setLabelsTextSize(15);
            renderer.setLegendTextSize(15);
            renderer.setPointSize(5f);
            renderer.setMargins(new int[] { 20, 30, 15, 20 });
            int length = colors.length;
            for (int i = 0; i < length; i++) {
                    XYSeriesRenderer r = new XYSeriesRenderer();
                    r.setColor(colors[i]);
                    r.setPointStyle(styles[i]);
                    renderer.addSeriesRenderer(r);
            }
    }

    private void setChartSettings(XYMultipleSeriesRenderer renderer,
                    String title, String xTitle, String yTitle, double xMin,
                    double xMax, double yMin, double yMax, int axesColor,
                    int labelsColor) {
            renderer.setChartTitle(title);
            renderer.setXTitle(xTitle);
            renderer.setYTitle(yTitle);
            renderer.setXAxisMin(xMin);
            renderer.setXAxisMax(xMax);
            renderer.setYAxisMin(yMin);
            renderer.setYAxisMax(yMax);
            renderer.setAxesColor(axesColor);
            renderer.setLabelsColor(labelsColor);
    }

    private XYMultipleSeriesDataset buildDataset(String[] titles,
                    List<double[]> xValues, List<double[]> yValues) {
            XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
            addXYSeries(dataset, titles, xValues, yValues, 0);
            return dataset;
    }

    private void addXYSeries(XYMultipleSeriesDataset dataset, String[] titles,
                    List<double[]> xValues, List<double[]> yValues, int scale) {
            int length = titles.length;
            for (int i = 0; i < length; i++) {
                    XYSeries series = new XYSeries(titles[i], scale);
                    double[] xV = xValues.get(i);
                    double[] yV = yValues.get(i);
                    int seriesLength = xV.length;
                    for (int k = 0; k < seriesLength; k++) {
                            series.add(xV[k], yV[k]);
                    }
                    dataset.addSeries(series);
            }
    }

    @Override
    protected void onDestroy() {
            super.onDestroy();
            if (view != null) {
                    chatLayout.removeView(view);
                    view = null;

            }
    }

}

解决方案

c++ 内存泄露

解决方案二：

http://www.tuicool.com/articles/n6vEVr