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我試圖在Android中創建自己的自定義條形圖，但我遇到了問題。我見過的圖形庫不提供我需要的靈活性和自定義。無論如何，我處於開始階段，並且有一個非常基本的佈局，基本上是放置「酒吧」的地方。 xml低於Android自定義條形圖佈局不添加
<?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="250dp"
android:layout_gravity="center"
android:layout_margin="0dp"
android:duplicateParentState="true"
android:orientation="horizontal">
<FrameLayout
android:layout_width="150dp"
android:layout_height="match_parent"
android:background="@drawable/sectioned_borders"
>
<FrameLayout
android:id="@+id/frame1"
android:layout_width="match_parent"
android:layout_height="238dp"
android:layout_gravity="bottom" >
</FrameLayout>
</FrameLayout>
<FrameLayout
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:background="@drawable/sectioned_borders"
>
<FrameLayout
android:id="@+id/frame2"
android:layout_width="match_parent"
android:layout_height="238dp"
android:layout_gravity="bottom" >
</FrameLayout>
</FrameLayout>
<FrameLayout
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:background="@drawable/sectioned_borders"
>
<FrameLayout
android:id="@+id/frame3"
android:layout_width="match_parent"
android:layout_height="238dp"
android:layout_gravity="bottom" >
</FrameLayout>
</FrameLayout>
</LinearLayout>
每個FrameLayout是一個部分，我將把這些條放在佈局中。現在，我想動態放置這些條，因爲它可以根據存在的條數而變化。所以我把一個基本的課程和活動放在一起，以便在本節中得到一些東西。我有以下類包含「欄」信息：
package com.example.graph.resources;
import android.content.Context;
import android.graphics.Color;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.FrameLayout;
import android.widget.TableLayout;
public class Bar {
private final static int MAX_PERCENT = 100;
private final static int MIN_PERCENT = 0;
private int percent = 0;
private String buttonText = "";
private String barID = "";
private Drive barDrive;
public TableLayout barLayout;
public Bar(Context context, int percent, String buttonText, String barID, int width) {
this.percent = (percent >= 0 && percent <= 100) ? percent : 0;
this.buttonText = (buttonText != null) ? buttonText : "";
this.barID = (buttonText != null) ? buttonText : "";
barDrive = new Drive();
// Create bar view
TableLayout tableLayout = new TableLayout(context);
TableLayout.LayoutParams tableParams = new TableLayout.LayoutParams(46, TableLayout.LayoutParams.MATCH_PARENT);
tableLayout.setStretchAllColumns(true);
tableLayout.setLayoutParams(tableParams);
FrameLayout frameLayout = new FrameLayout(tableLayout.getContext());
FrameLayout.LayoutParams frameParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, (int)(tableLayout.getHeight() * 0.9));
frameParams.leftMargin = 3;
frameLayout.setLayoutParams(frameParams);
// Create Views (bars)
View viewUnderlay = new View(frameLayout.getContext());
LayoutParams viewUnderlayParams = new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
viewUnderlay.setLayoutParams(viewUnderlayParams);
View viewOverlay = new View(frameLayout.getContext());
LayoutParams viewOverlayParams = new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
viewOverlay.setLayoutParams(viewOverlayParams);
viewOverlay.setBackgroundColor(Color.BLUE);
// combine views
frameLayout.addView(viewUnderlay);
frameLayout.addView(viewOverlay);
tableLayout.addView(frameLayout);
this.barLayout = tableLayout;
}
// Maybe more advantageous to make this a separate class...
private class Drive {
private int driveNumber = 0;
private int value = 0;
public Drive() {
// TODO Default Drive Info
}
private Drive(int driveNumber, int value) {
// TODO Setup Drive Info
}
}
}
正如你所看到的。 「Bar」類只是設置一些成員數據，然後我在這裏添加「bar」佈局。所以在我的主要活動課上，我只是嘗試填充第一幀。我的主類則是：
package com.example.bargraphtest2;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.ViewTreeObserver;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import com.example.bargraphtest2.R;
import com.example.graph.resources.Bar;
public class MainActivity extends Activity {
LinearLayout la;
FrameLayout frame1;
Context ctx;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dynamic_graph_base_layout);
frame1 = (FrameLayout)this.findViewById(R.id.frame1);
ctx = this;
ViewTreeObserver vto = frame1.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
frame1.getViewTreeObserver().removeOnGlobalLayoutListener(this);
//test with frame 1
int testPadding = 3;
int barCount = 3;
int width = (frame1.getWidth() - ((barCount + 1) * testPadding))/barCount;
for(int i = 1; i <= barCount; i++){
Bar bar = new Bar(ctx,i * 10, "1", "bar" + i, width);
frame1.addView(bar.barLayout);
}
frame1.refreshDrawableState();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
所以，我嘗試運行這一點，我只是把我的一般格式（XML格式）。我沒有得到（3）酒吧。當我調試下面的代碼時，我會在創建條形圖（佈局）時逐步瀏覽，但layoutparams中的寬度和高度未正確設置。我在這裏看到了負值，這對MATCH_PARENT是正確的，但對於實際寬度不適用。我看到計算寬度的合理值。所以......我在這裏做錯了什麼？任何建議/幫助將不勝感激。非常感謝你！
因爲這張貼是昨晚發佈的，所以我會把它撞上來，以確保它不會被掩埋。 – 2014-12-02 12:21:28