android 安卓 canvas 绘制折线图

Android-FancyChart ================== FancyChart (line chart) with nice graphics Usage ----- Add view to your XML layout <com.svenkapudija.fancychart.FancyChart android:id="@+id/chart" android:layout_width="match_parent" android:layout_height="match_parent" > </com.svenkapudija.fancychart.FancyChart> and then initialize it in your Activity FancyChart chart = (FancyChart) findViewById(R.id.chart); // First data set ChartData data = new ChartData(ChartData.LINE_COLOR_BLUE); int[] yValues = new int[]{0, 8, 9, 18, 35, 30, 33, 32, 46, 53, 50, 42}; for(int i = 8; i <= 19; i++) { data.addPoint(i, yValues[i-8]); data.addXValue(i, i + ":00"); } chart.addData(data); // Second data set ChartData data2 = new ChartData(ChartData.LINE_COLOR_RED); int[] yValues2 = new int[]{0, 5, 9, 23, 15, 35, 45, 50, 41, 45, 32, 24}; for(int i = 8; i <= 19; i++) { data2.addPoint(i, yValues2[i-8]); data2.addXValue(i, i + ":00"); } chart.addData(data2);  `addXValue` and `addYValue` are optional. If you don't add any, FancyChart will add ~10 points on X and Y axis automatically. onPointClickListener ---- You can add listener when specific point is clicked chart.setOnPointClickListener(new FancyChartPointListener() { @Override public void onClick(Point point) { Toast.makeText(MainActivity.this, "I clicked point " + point, Toast.LENGTH_LONG).show(); } }); Styling ---- Use `FancyChartStyle` if needed - there are all the colors, stroke widths etc. for visual fine-tuning. For example if you don't want translucent background below lines set it to `false` FancyChartStyle style = chart.getChartStyle(); style.setDrawBackgroundBelowLine(false); Developed by ------------ * Sven Kapuđija License ------- Copyright 2012 Sven Kapuđija Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.