MPAndroidChart圖例定製

Question

我正在使用MPAndroidChart library。我想在MPAndroidChart中定製傳說。在MPAndroidChart庫中，我試圖設置圖例的位置。通過給定的代碼legend.setPosition（LegendPosition.BELOW_CHART_CENTER）但無法做到這一點。我必須設置傳說如以下的圖像

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Answer 1

在你的情況我建議你禁用由圖表繪製，而是拿出自己的執行Legend。

chart.getLegend().setEnabled(false) 

在上面顯示你可能需要一個ListView從圖表Legend對象獲取數據並顯示它的情況。

當您看看Legend class時，您會注意到它具有顏色和標籤的成員變量。

您可以檢索這些陣列（getColors()，getLegendLabels()）並將它們用於顯示在ListView中。

Answer 2

請看給定的答案MPAndroidChart - Legend labels are being cut off。我已經根據你的問題提供了答案。 尋找給定的代碼，肯定會幫助你。 您必須按照以下步驟來實現他們的傳奇色彩和標籤定製的傳說：

步驟1

Legend legend = mChart.getLegend(); 

步驟2

int colorcodes[] = legend.Colors(); 

步驟3

for (int i = 0; i < legend.Colors().length-1; i++) { 
..... 
..... 
} 

步驟4

然後，你將不得不採取一種佈局水平或垂直的，並得到傳說中的顏色代碼和傳說的標籤，並根據傳說長度創建佈局和標籤。代碼示例如下：

 LinearLayout.LayoutParams parms_left_layout = new LinearLayout.LayoutParams(
       LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); 
     parms_left_layout.weight = 1F; 
     LinearLayout left_layout = new LinearLayout(context); 
     left_layout.setOrientation(LinearLayout.HORIZONTAL); 
     left_layout.setGravity(Gravity.CENTER); 
     left_layout.setLayoutParams(parms_left_layout); 

     LinearLayout.LayoutParams parms_legen_layout = new LinearLayout.LayoutParams(
       20, 20); 
     parms_legen_layout.setMargins(0, 0, 20, 0); 
     LinearLayout legend_layout = new LinearLayout(context); 
     legend_layout.setLayoutParams(parms_legen_layout); 
     legend_layout.setOrientation(LinearLayout.HORIZONTAL); 
     legend_layout.setBackgroundColor(colorcodes[i]); 
     left_layout.addView(legend_layout); 

     TextView txt_unit = new TextView(context); 
     txt_unit.setText(legend.getLabel(i)); 
     left_layout.addView(txt_unit); 

     LinearLayout.LayoutParams parms_middle_layout = new LinearLayout.LayoutParams(
       LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); 
     parms_middle_layout.weight = 1F; 
     LinearLayout middle_layout = new LinearLayout(this); 
     middle_layout.setOrientation(LinearLayout.HORIZONTAL); 
     middle_layout.setGravity(Gravity.CENTER); 
     middle_layout.setLayoutParams(parms_middle_layout); 

     TextView txt_leads = new TextView(this); 
     txt_leads.setText("450"); 
     middle_layout.addView(txt_leads); 

     LinearLayout.LayoutParams parms_right_layout = new LinearLayout.LayoutParams(
       LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); 
     parms_right_layout.weight = 1F; 
     LinearLayout right_layout = new LinearLayout(this); 
     right_layout.setOrientation(LinearLayout.HORIZONTAL); 
     right_layout.setGravity(Gravity.CENTER); 
     right_layout.setLayoutParams(parms_right_layout); 

     TextView txt_leads_percentage = new TextView(this); 
     txt_leads_percentage.setText(munit_percentage_list.get(i) + ""); 
     right_layout.addView(txt_leads_percentage); 

     childlayout.addView(left_layout); 
     childlayout.addView(middle_layout); 
     childlayout.addView(right_layout); 

並且在此之後，將您（在運行時創建的子佈局）添加到主佈局。

Answer 3

Follow below code for custom legend. 
    create table_row_legend.xml in layout resource 

    <TableRow xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:gravity="center" 
     android:weightSum="3"> 
     <LinearLayout 
      android:id="@+id/tv_color_container" 
      android:layout_width="0dp" 
      android:layout_height="match_parent" 
      android:layout_gravity="center" 
      android:layout_weight="0.30" 
      android:orientation="horizontal" 
      android:gravity="right" 
      android:padding="5dp"> 

      <LinearLayout 
       android:id="@+id/tv_color" 
       android:layout_width="20dp" 
       android:layout_height="20dp" 
       android:layout_gravity="center" 

       android:orientation="horizontal" 
       /> 
     </LinearLayout> 

     <TextView 
      android:id="@+id/tv_label" 
      android:layout_width="0dp" 
      android:layout_gravity="top" 
      android:layout_weight="1.35" 

      android:gravity="left|top" 
      android:padding="3dp" 
      android:singleLine="true" 

      android:textColor="#2b2b2b" 
      android:textSize="16sp" /> 

     <TextView 
      android:id="@+id/tv_amt" 
      android:layout_width="0dp" 
      android:layout_weight="1.35" 
      android:gravity="left|top" 
      android:padding="3dp" 

      android:textColor="#2b2b2b" 
      android:textSize="16sp" /> 
    </TableRow> 



    Create new Linear layout below your Pie chart and wrap parent layout with scroll layout with static height to pie chart 

    <?xml version="1.0" encoding="utf-8"?> 
    <ScrollView 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="match_parent" 
     android:background="#ffffff" 
     android:layout_height="match_parent"> 

     <RelativeLayout 
      xmlns:android="http://schemas.android.com/apk/res/android" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:layout_marginTop="10dp" 
      android:paddingBottom="10dp" 
      android:layout_marginBottom="10dp" 
      android:layout_centerInParent="true" 
      > 
     <com.github.mikephil.charting.charts.PieChart 
       android:id="@+id/chart1" 
       android:layout_width="match_parent" 
       android:layout_height="400dp" 
       android:layout_below="@+id/tv_info" 
       android:layout_centerHorizontal="true" 
       android:layout_marginTop="10dp" 

       android:background="#ffffff" 
       android:clickable="true" /> 

      <TableLayout 
       android:id="@+id/child_layout" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_below="@+id/chart1" 
       android:orientation="vertical" /> 
     </RelativeLayout> 

    </ScrollView> 


**Make changes in your activity class as follows** 

public void setCustomLegend(){ 
     int colorcodes[] = l.getColors(); 
     Context context = DistributorGraphActivity.this; 
     for (int i = 0; i < l.getColors().length - 1; i++) { 
      LayoutInflater inflater = getLayoutInflater(); 
      TableRow tr = (TableRow)   inflater.inflate(R.layout.table_row_legend, 
        childlayout, false); 
      childlayout.addView(tr); 
      LinearLayout linearLayoutColorContainer=(LinearLayout) tr.getChildAt(0); 
      LinearLayout linearLayoutColor= (LinearLayout)   linearLayoutColorContainer.getChildAt(0); 
      TextView tvLabel = (TextView) tr.getChildAt(1); 
      TextView tvAmt = (TextView) tr.getChildAt(2); 
      linearLayoutColor.setBackgroundColor(colorcodes[i]); 
      tvLabel.setText(l.getLabel(i)); 
      tvAmt.setText(arrListDealerGraph.get(i).getAmt()); 
     } 
     mChart.getLegend().setWordWrapEnabled(true); 
     mChart.getLegend().setEnabled(false); 
}