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我做了一個自定義的View DrawView.java，我畫了一條簡單的線。我希望這個自定義視圖覆蓋我的MainActivity.java的activity_main.xml。出於測試目的，XML文件中有一個簡單的Button。繪製的線應該在Button上繪製。此刻，劃線位於按鈕下方，分別位於XML視圖下方。通過XML佈局的自定義視圖
我怎樣才能做到這一點，並在一個完美的世界仍然保持按鈕可點擊？ ）
DrawView.java
public class DrawView extends LinearLayout {
Paint paint = new Paint();
private int endX;
private int endY;
private int startX;
private int startY;
public DrawView(Context context) {
super(context);
LayoutInflater mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mInflater.inflate(R.layout.activity_main, this, true);
paint.setColor(Color.BLACK);
paint.setStrokeWidth(10);
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawLine(startX, startY, endX, endY, paint);
}
public void setCoordinates(int startX, int startY, int endX, int endY) {
this.endX = endX;
this.endY = endY;
this.startX = startX;
this.startY = startY;
}}
MainActivity.java
public class MainActivity extends ActionBarActivity implements OnTouchListener{
DrawView drawView;
private int number;
private Handler handler;
private boolean Running = true;
private int endX = 500;
private int endY = 500;
private int startX = 50;
private int startY = 50;
private int frames = 25;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
drawView = new DrawView(this);
drawView.setBackgroundColor(Color.WHITE);
handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
while (Running) {
try {
Thread.sleep(40);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.post(new Runnable() {
@Override
public void run() {
int coordX = ((((endX - startX)/frames) * number))
+ startX;
int coordY = ((((endY - startY)/frames) * number))
+ startY;
number += 1;
drawView.setCoordinates(startX, startY, coordX,
coordY);
setContentView(drawView);
if ((coordX - endX) == 0 && coordY - endY ==0) {
Running = false;
}
}
});
}
// TODO Auto-generated method stub
}
};
new Thread(runnable).start();
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return false;
}}
activity_main.xml中
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="de.trialar.linedrawer.MainActivity"
>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="180dp"
android:text="Button" />
更新：
嗨馬丁，我試過你的解決方案，它適合我。我用你的方法而不是Imageview。當我點擊一個按鈕時，我的線條被繪製出來。不幸的是，當這條線被繪製時，我的onClicklistener不再被調用。但按鈕仍然是可點擊的（顏色變成默認的Android按鈕藍色）。
public class MainActivity extends ActionBarActivity implements OnTouchListener,
OnClickListener {
// DrawView drawView;
private int number;
private Handler handler;
private boolean Running = true;
private int endX = 50;
private int endY = 500;
private int startX = 50;
private int startY = 50;
private int frames = 25;
ImageView Line01;
Button button2;
Button buttonLineDrawer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// drawView = new DrawView(this);
// drawView.setBackgroundColor(Color.WHITE);
Line01 = (ImageView) findViewById(R.id.Line01);
Line01.setVisibility(View.GONE);
Button buttonLineDrawer;
buttonLineDrawer = (Button) findViewById(R.id.buttonLineDrawer);
buttonLineDrawer.setOnClickListener(this);
Button button2;
button2 = (Button) findViewById(R.id.button2);
button2.setOnClickListener(this);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.buttonLineDrawer:
Toast.makeText(getApplicationContext(), "klick", Toast.LENGTH_LONG)
.show();
Running = true;
number = 0;
drawLine();
break;
case R.id.button2:
Toast.makeText(getApplicationContext(), "klick", Toast.LENGTH_LONG)
.show();
break;
}
}
public void drawLine() {
Line01.setVisibility(View.VISIBLE);
handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
while (Running) {
try {
Thread.sleep(40);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.post(new Runnable() {
@Override
public void run() {
int coordX = ((((endX - startX)/frames) * number))
+ startX;
int coordY = ((((endY - startY)/frames) * number))
+ startY;
number += 1;
CustomDraw.setCoordinates(startX, startY, coordX,
coordY);
setContentView(R.layout.activity_main);
if ((coordX - endX) == 0 && coordY - endY == 0) {
Running = false;
}
}
});
}
}
};
new Thread(runnable).start();
}
}
，你實現了這個drawView函數在XML。 – Mukesh 2014-08-28 10:53:13
我膨脹DrawView中的xml。這是做錯了嗎？ – trialar 2014-08-28 10:54:52
是的，他們是正確的，問題是，按鈕工作完美，直到線被繪製。兩個按鈕的祝酒都沒有顯示出來，但是當我點擊它時，按鈕會變成典型的藍色。 – trialar 2014-08-29 08:09:16