我画了一个没有xml的条形图.我必须在图表下面添加一个按钮.任何人都可以建议解决方案.谢谢你提前!!以下是我的程序. GraphViewDemo.java public class GraphViewDemo extends Activity {public static Strin
GraphViewDemo.java
public class GraphViewDemo extends Activity {
public static String graphreturn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
float[] values = new float[] { 2.0f,3.0f, 5.0f, 1.0f , 6.0f , 4.0f ,7.0f };
String[] verlabels = new String[] { "7","6","5","4","3", "2", "1" };
String[] horlabels = new String[] {"jan20","jan21","jan22","jan23","jan24",
"jan25","jan26"};
GraphView graphView = new GraphView(this, values, "GraphViewDemo",horlabels, verlabels, GraphView.BAR);
setContentView(graphView);}}
GraphView.java
public class GraphView extends View{
public static boolean BAR = true;
public static boolean LINE = false;
private Paint paint;
private float[] values;
private String[] horlabels;
private String[] verlabels;
private String title;
private boolean type;
Context context;
private Drawable mDrawable;
private Runnable in ;
public GraphView(Context context, float[] values, String title, String[] horlabels,String[] verlabels, boolean type) {
super(context);
if (values == null)
values = new float[0];
else
this.values = values;
if (title == null)
title = "";
else
this.title = title;
if (horlabels == null)
this.horlabels = new String[0];
else
this.horlabels = horlabels;
if (verlabels == null)
this.verlabels = new String[0];
else
this.verlabels = verlabels;
this.type = type;
paint = new Paint();
}
@Override
protected void onDraw(final Canvas canvas) {
context=getContext();
float border = 20;
float horstart = border * 2;
float height = getHeight()-50;
float width = getWidth();
float max = getMax();
Log.w("max", ""+max);
float min = getMin();
Log.w("min", ""+min);
float diff = max - min;
float graphheight = height - (2 * border);
float graphwidth = width - (2 * border);
paint.setTextAlign(Align.LEFT);
int vers = verlabels.length - 1;
for (int i = 0; i < verlabels.length; i++) {
paint.setColor(Color.DKGRAY);
float y = ((graphheight / vers) * i) + border;
canvas.drawLine(horstart, y, width, y, paint);
paint.setColor(Color.WHITE);
canvas.drawText(verlabels[i], 0, y, paint);
}
int hors = horlabels.length;
for (int i = 0; i < horlabels.length; i++) {
paint.setColor(Color.DKGRAY);
float x = ((graphwidth / hors) * i) + horstart;
canvas.drawLine(x, height - border, x, border, paint);
paint.setTextAlign(Align.CENTER);
if (i==horlabels.length+5)
paint.setTextAlign(Align.RIGHT);
if (i==0)
paint.setTextAlign(Align.LEFT);
paint.setColor(Color.WHITE);
canvas.drawText(horlabels[i], x, height - 4, paint);
}
paint.setTextAlign(Align.CENTER);
canvas.drawText(title, (graphwidth / 2) + horstart, border - 4, paint);
int x = 0;
int y = 0;
Paint paint = new Paint();
Paint paint1 = new Paint();
paint.setStyle(Paint.Style.FILL);
String str2rotate = "Rotated!";
// draw bounding rect before rotating text
Rect rect = new Rect();
paint.getTextBounds(str2rotate, 0, str2rotate.length(), rect);
canvas.translate(x, y);
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.FILL);
paint.setStrokeWidth(1);
paint.setStyle(Paint.Style.STROKE);
paint1.setColor(Color.RED);
canvas.drawText("!Rotated", 0, 0, paint1);
mDrawable = context.getResources().getDrawable(R.drawable.previousi);
mDrawable.setBounds(getWidth()/2-40,getHeight()-40, getWidth()/2+30, getHeight()-20);
mDrawable.draw(canvas);
mDrawable.scheduleSelf(in, 0);
//....................
in = new Runnable() {
public void run() {
try {
//canvas.restore();
mDrawable.setBounds(getWidth()/2,getHeight(), getWidth(), getHeight()-20);
mDrawable.draw(canvas);
}
catch (Exception e) {
e.printStackTrace();
}
}
};
Thread thread = new Thread(null, in, "graphview");
thread.start();
if (max != min) {
paint.setColor(Color.BLUE);
paint.setStyle(Paint.Style.FILL);
if (type == BAR) {
float datalength = values.length;
float colwidth = (width - (2 * border)) / datalength;
for (int i = 0; i < values.length; i++) {
float val = values[i] - min;
float rat = val / diff;
float h = graphheight * rat;
canvas.drawRect((i * colwidth) + horstart, (border - h) + graphheight, ((i * colwidth) + horstart) + (colwidth - 1), height - (border - 1), paint);
}
} else {
float datalength = values.length;
float colwidth = (width - (2 * border)) / datalength;
float halfcol = colwidth / 2;
float lasth = 0;
for (int i = 0; i < values.length; i++) {
float val = values[i] - min;
float rat = val / diff;
float h = graphheight * rat;
if (i > 0)
canvas.drawLine(((i - 1) * colwidth) + (horstart + 1) + halfcol, (border - lasth) + graphheight, (i * colwidth) + (horstart + 1) + halfcol, (border - h) + graphheight, paint);
lasth = h;
}
}
}
}
private float getMax() {
float largest = Integer.MIN_VALUE;
for (int i = 0; i < values.length; i++)
if (values[i] > largest)
largest = values[i];
return largest;
}
private float getMin() {
float smallest = Integer.MAX_VALUE;
for (int i = 0; i < values.length; i++)
if (values[i] < smallest)
smallest = values[i];
return smallest;
}
}
试试这个：
btn = new Button(this);
btn.setText("Hello Button");
RelativeLayout.LayoutParams paramsd = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONT ENT,LayoutParams.WRAP_CONTENT);
paramsd.height = 60;
paramsd.width = 60;
btn.setLayoutParams(paramsd);
addContentView(btn,paramsd);
编辑：
import android.widget.Button;
添加按钮
Button b = new Button(this);
b.setText("Button added dynamically!");
b.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
b.setId(MY_BUTTON);
b.setOnClickListener(this);
ll.addView(b);
EDIT2：
你可以创建LinearLayout linearLayout = new LinearLayout(this);并添加Button
Button btn = new Button(this);
btn.setText("Just another button");
linearLayout.addView(btn);
Edit3：另一个例子：
final Button button = new Button(this);
button.setText("Press me!");
setContentView(button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
});