这是创建自定义可拖动抽屉的基本示例。
这些是我经历过的参考资料。
为了检测拖动/猛击手势,我使用了 GestureDetectorCompat,并且
我提到:https://developer.android.com/training/gestures/ detector https://developer.android.com/training/gestures/detector
要创建抽屉打开和关闭动画,我提到:https://youtu.be/OHcfs6rStRo https://youtu.be/OHcfs6rStRo
请注意,这是一个非常基本的示例。
您可以以此为基础来创建您的最终目标。
您必须过滤掉收到的不需要的拖动/猛击回调。
你必须忽略抽屉上的水龙头。
这是实现。
MainActivity.java
import androidx.appcompat.app.AppCompatActivity;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.constraintlayout.widget.ConstraintSet;
import androidx.core.view.GestureDetectorCompat;
import android.os.Bundle;
import android.transition.TransitionManager;
import android.view.GestureDetector;
import android.view.MotionEvent;
public class MainActivity extends AppCompatActivity {
private boolean mIsDrawerOpened;
private ConstraintLayout mRootConstraintLayout;
private final ConstraintSet mDrawerClosedConstraintSet = new ConstraintSet();
private final ConstraintSet mDrawerOpenedConstraintSet = new ConstraintSet();
private GestureDetectorCompat mGestureDetector;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_drawer_closed);
// Drawer is initially closed
mIsDrawerOpened = false;
mRootConstraintLayout = findViewById(R.id.rootConstraintLayout);
mDrawerClosedConstraintSet.clone(this, R.layout.activity_main_drawer_closed);
mDrawerOpenedConstraintSet.clone(this, R.layout.activity_main_drawer_opened);
mGestureDetector = new GestureDetectorCompat(
getApplicationContext(),
new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
// Drag / Fling gesture detected
// TODO: Recongnize unwanted drag / fling gestures and ignore them.
TransitionManager.beginDelayedTransition(mRootConstraintLayout);
// Drawer is closed?
if(!mIsDrawerOpened) {
// Open the drawer
mDrawerOpenedConstraintSet.applyTo(mRootConstraintLayout);
mIsDrawerOpened = true;
}
return true;
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
// Single tap detected
// TODO: If user has tapped on the drawer, do not close it.
TransitionManager.beginDelayedTransition(mRootConstraintLayout);
// Drawer is opened?
if(mIsDrawerOpened) {
// Close the drawer
mDrawerClosedConstraintSet.applyTo(mRootConstraintLayout);
mIsDrawerOpened = false;
}
return true;
}
@Override
public boolean onDown(MotionEvent e) {
return true;
}
}
);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
mGestureDetector.onTouchEvent(event);
return super.onTouchEvent(event);
}
}
res/layout/activity_main_drawer_close.xml
<ConstraintLayout
android:id="@+id/rootConstraintLayout"
android:clipChildren="false" >
<ConstraintLayout
android:id="@+id/drawerConstraintLayout"
android:layout_width="152dp"
android:layout_height="108dp"
android:background="@color/colorPrimaryDark"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="parent" >
<Button
android:id="@+id/button1"
android:layout_width="52dp"
android:layout_height="52dp"
android:text="1"
android:backgroundTint="@color/colorAccent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="@id/button2" />
<Button
android:id="@+id/button2"
android:layout_width="52dp"
android:layout_height="52dp"
android:text="2"
android:backgroundTint="@color/colorAccent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@id/button1"
app:layout_constraintEnd_toEndOf="parent" />
</ConstraintLayout>
<ImageView
android:id="@+id/notch"
android:layout_width="8dp"
android:layout_height="72dp"
android:src="@drawable/drawer_notch"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@id/drawerConstraintLayout" />
</ConstraintLayout>
res/layout/activity_main_drawer_opened.xml
<ConstraintLayout
android:id="@+id/rootConstraintLayout" >
<ConstraintLayout
android:id="@+id/drawerConstraintLayout"
android:layout_width="152dp"
android:layout_height="108dp"
android:background="@color/colorPrimaryDark"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" >
<Button
android:id="@+id/button1"
android:layout_width="52dp"
android:layout_height="52dp"
android:text="1"
android:backgroundTint="@color/colorAccent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="@id/button2" />
<Button
android:id="@+id/button2"
android:layout_width="52dp"
android:layout_height="52dp"
android:text="2"
android:backgroundTint="@color/colorAccent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@id/button1"
app:layout_constraintEnd_toEndOf="parent" />
</ConstraintLayout>
<ImageView
android:id="@+id/notch"
android:layout_width="8dp"
android:layout_height="72dp"
android:src="@drawable/drawer_notch"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@id/drawerConstraintLayout" />
</ConstraintLayout>
res/drawable/drawer_notch.xml
<shape
android:shape="rectangle">
<corners android:radius="4dp" />
<solid android:color="@color/colorAccent" />
</shape>
应用程序/build.gradle
android {
defaultConfig {
minSdkVersion 19
.
.
.
}
.
.
.
}
Result :