前面介紹了利用Android自帶的控件,進行滑動翻頁製作效果,現在我們通過代碼實現一些滑動翻頁的動畫效果。
Animation實現動畫有兩個方式:幀動畫(frame-by-frame animation)和補間動畫(tweened animation)
本示例通過繼承Animation自定義Rotate3D,實現3D翻頁效果。效果圖如下:
1、Rotate3D(Animation)
首先,自定義Animation的3D動畫類Rotate3D
- public class Rotate3D extends Animation {
- private float fromDegree; // 旋轉起始角度
- private float toDegree; // 旋轉終止角度
- private float mCenterX; // 旋轉中心x
- private float mCenterY; // 旋轉中心y
- private Camera mCamera;
- public Rotate3D(float fromDegree, float toDegree, float centerX, float centerY) {
- this.fromDegree = fromDegree;
- this.toDegree = toDegree;
- this.mCenterX = centerX;
- this.mCenterY = centerY;
- }
- @Override
- public void initialize(int width, int height, int parentWidth, int parentHeight) {
- super.initialize(width, height, parentWidth, parentHeight);
- mCamera = new Camera();
- }
- @Override
- protected void applyTransformation(float interpolatedTime, Transformation t) {
- final float FromDegree = fromDegree;
- float degrees = FromDegree + (toDegree - fromDegree) * interpolatedTime; // 旋轉角度(angle)
- final float centerX = mCenterX;
- final float centerY = mCenterY;
- final Matrix matrix = t.getMatrix();
- if (degrees <= -76.0f) {
- degrees = -90.0f;
- mCamera.save();
- mCamera.rotateY(degrees); // 旋轉
- mCamera.getMatrix(matrix);
- mCamera.restore();
- } else if (degrees >= 76.0f) {
- degrees = 90.0f;
- mCamera.save();
- mCamera.rotateY(degrees);
- mCamera.getMatrix(matrix);
- mCamera.restore();
- } else {
- mCamera.save();
- mCamera.translate(0, 0, centerX); // 位移x
- mCamera.rotateY(degrees);
- mCamera.translate(0, 0, -centerX);
- mCamera.getMatrix(matrix);
- mCamera.restore();
- }
- matrix.preTranslate(-centerX, -centerY);
- matrix.postTranslate(centerX, centerY);
- }
- }
public class Rotate3D extends Animation {
private float fromDegree; // 旋轉起始角度
private float toDegree; // 旋轉終止角度
private float mCenterX; // 旋轉中心x
private float mCenterY; // 旋轉中心y
private Camera mCamera;
public Rotate3D(float fromDegree, float toDegree, float centerX, float centerY) {
this.fromDegree = fromDegree;
this.toDegree = toDegree;
this.mCenterX = centerX;
this.mCenterY = centerY;
}
@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
mCamera = new Camera();
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
final float FromDegree = fromDegree;
float degrees = FromDegree + (toDegree - fromDegree) * interpolatedTime; // 旋轉角度(angle)
final float centerX = mCenterX;
final float centerY = mCenterY;
final Matrix matrix = t.getMatrix();
if (degrees <= -76.0f) {
degrees = -90.0f;
mCamera.save();
mCamera.rotateY(degrees); // 旋轉
mCamera.getMatrix(matrix);
mCamera.restore();
} else if (degrees >= 76.0f) {
degrees = 90.0f;
mCamera.save();
mCamera.rotateY(degrees);
mCamera.getMatrix(matrix);
mCamera.restore();
} else {
mCamera.save();
mCamera.translate(0, 0, centerX); // 位移x
mCamera.rotateY(degrees);
mCamera.translate(0, 0, -centerX);
mCamera.getMatrix(matrix);
mCamera.restore();
}
matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}
然後,實例化Rotate3D的旋轉方向
- public void initAnimation() {
- // 獲取旋轉中心
- DisplayMetrics dm = new DisplayMetrics();
- dm = getResources().getDisplayMetrics();
- mCenterX = dm.widthPixels / 2;
- mCenterY = dm.heightPixels / 2;
- // 定義旋轉方向
- int duration = 1000;
- lQuest1Animation = new Rotate3D(0, -90, mCenterX, mCenterY); // 下一頁的【question1】旋轉方向(從0度轉到-90,參考系爲水平方向爲0度)
- lQuest1Animation.setFillAfter(true);
- lQuest1Animation.setDuration(duration);
- lQuest2Animation = new Rotate3D(90, 0, mCenterX, mCenterY); // 下一頁的【question2】旋轉方向(從90度轉到0,參考系爲水平方向爲0度)(起始第一題)
- lQuest2Animation.setFillAfter(true);
- lQuest2Animation.setDuration(duration);
- rQuest1Animation = new Rotate3D(0, 90, mCenterX, mCenterY); // 上一頁的【question1】旋轉方向(從0度轉到90,參考系爲水平方向爲0度)
- rQuest1Animation.setFillAfter(true);
- rQuest1Animation.setDuration(duration);
- rQuest2Animation = new Rotate3D(-90, 0, mCenterX, mCenterY); // 上一頁的【question2】旋轉方向(從-90度轉到0,參考系爲水平方向爲0度)
- rQuest2Animation.setFillAfter(true);
- rQuest2Animation.setDuration(duration);
- }
public void initAnimation() {
// 獲取旋轉中心
DisplayMetrics dm = new DisplayMetrics();
dm = getResources().getDisplayMetrics();
mCenterX = dm.widthPixels / 2;
mCenterY = dm.heightPixels / 2;
// 定義旋轉方向
int duration = 1000;
lQuest1Animation = new Rotate3D(0, -90, mCenterX, mCenterY); // 下一頁的【question1】旋轉方向(從0度轉到-90,參考系爲水平方向爲0度)
lQuest1Animation.setFillAfter(true);
lQuest1Animation.setDuration(duration);
lQuest2Animation = new Rotate3D(90, 0, mCenterX, mCenterY); // 下一頁的【question2】旋轉方向(從90度轉到0,參考系爲水平方向爲0度)(起始第一題)
lQuest2Animation.setFillAfter(true);
lQuest2Animation.setDuration(duration);
rQuest1Animation = new Rotate3D(0, 90, mCenterX, mCenterY); // 上一頁的【question1】旋轉方向(從0度轉到90,參考系爲水平方向爲0度)
rQuest1Animation.setFillAfter(true);
rQuest1Animation.setDuration(duration);
rQuest2Animation = new Rotate3D(-90, 0, mCenterX, mCenterY); // 上一頁的【question2】旋轉方向(從-90度轉到0,參考系爲水平方向爲0度)
rQuest2Animation.setFillAfter(true);
rQuest2Animation.setDuration(duration);
}
2、Activity
首先,定義兩個佈局文件,用於旋轉的畫面切換
main.xml
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:id="@+id/layout_main"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:orientation="vertical">
- ...
- </LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout_main"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
...
</LinearLayout>
next.xml
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:id="@+id/layout_next"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:orientation="vertical">
- ...
- </LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout_next"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
...
</LinearLayout>
限於篇幅,完整佈局文件請詳見源碼 ^_^
然後,初始化兩個旋轉的佈局文件資源
- private void initMain(){
- setContentView(R.layout.main);
- layoutmain = (LinearLayout)findViewById(R.id.layout_main);
- btn_MainLast = (Button)findViewById(R.id.main_last);
- btn_MainNext = (Button)findViewById(R.id.main_next);
- btn_MainLast.setOnClickListener(listener);
- btn_MainNext.setOnClickListener(listener);
- }
- private void initNext(){
- setContentView(R.layout.next);
- layoutnext = (LinearLayout)findViewById(R.id.layout_next);
- btn_NextLast = (Button)findViewById(R.id.next_last);
- btn_NextNext = (Button)findViewById(R.id.next_next);
- btn_NextLast.setOnClickListener(listener);
- btn_NextNext.setOnClickListener(listener);
- }
private void initMain(){
setContentView(R.layout.main);
layoutmain = (LinearLayout)findViewById(R.id.layout_main);
btn_MainLast = (Button)findViewById(R.id.main_last);
btn_MainNext = (Button)findViewById(R.id.main_next);
btn_MainLast.setOnClickListener(listener);
btn_MainNext.setOnClickListener(listener);
}
private void initNext(){
setContentView(R.layout.next);
layoutnext = (LinearLayout)findViewById(R.id.layout_next);
btn_NextLast = (Button)findViewById(R.id.next_last);
btn_NextNext = (Button)findViewById(R.id.next_next);
btn_NextLast.setOnClickListener(listener);
btn_NextNext.setOnClickListener(listener);
}
最後,設置佈局文件中的按鈕監聽事件,響應3D旋轉動畫和方向
- private View.OnClickListener listener = new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- switch (v.getId()) {
- case R.id.main_last: // 上一頁
- layoutmain.startAnimation(lQuest1Animation); // 當前頁向左旋轉(0,-90)
- initNext();
- layoutnext.startAnimation(lQuest2Animation); // 下一頁向左旋轉(90, 0)
- break;
- case R.id.main_next: // 下一頁
- layoutmain.startAnimation(rQuest1Animation); // 當前頁向右旋轉(0,90)
- initNext();
- layoutnext.startAnimation(rQuest2Animation); // 下一頁向右旋轉(-90, 0)
- break;
- case R.id.next_last:
- layoutnext.startAnimation(lQuest1Animation);
- initMain();
- layoutmain.startAnimation(lQuest2Animation);
- break;
- case R.id.next_next:
- layoutnext.startAnimation(rQuest1Animation);
- initMain();
- layoutmain.startAnimation(rQuest2Animation);
- break;
- }
- }
- };
private View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.main_last: // 上一頁
layoutmain.startAnimation(lQuest1Animation); // 當前頁向左旋轉(0,-90)
initNext();
layoutnext.startAnimation(lQuest2Animation); // 下一頁向左旋轉(90, 0)
break;
case R.id.main_next: // 下一頁
layoutmain.startAnimation(rQuest1Animation); // 當前頁向右旋轉(0,90)
initNext();
layoutnext.startAnimation(rQuest2Animation); // 下一頁向右旋轉(-90, 0)
break;
case R.id.next_last:
layoutnext.startAnimation(lQuest1Animation);
initMain();
layoutmain.startAnimation(lQuest2Animation);
break;
case R.id.next_next:
layoutnext.startAnimation(rQuest1Animation);
initMain();
layoutmain.startAnimation(rQuest2Animation);
break;
}
}
};
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