我想在Android Studio中做一个可以从右到左拖动的小视图。这个视图会有2个按钮。
当你选择其中一个按钮或在其外按下时,小菜单将再次隐藏。
我一直在搜索,但我没有找到任何库可以做类似的事情。我也不知道该怎么做。
我可以在一个单独的视图(布局xml)中绘制小视图,但我不知道如何添加它并创建通过拖动打开或关闭的事件。
我怎么才能做到这一点?
谢谢。
这是一个创建自定义可拖动抽屉的基本例子。
这些是我的参考资料。
为了检测拖动手势,我使用了GestureDetectorCompat,并且我参考了......。https:/developer.android.comtraininggesturesdetector。
为了创建抽屉的打开和关闭动画,我参考了。https:/youtu.beOHcfs6rStRo。
请注意,这是一个非常基本的例子.你可以用这个作为基础来创建你的最终目标.你将不得不过滤掉你收到的不需要的拖动回调.你将不得不忽略你将在抽屉上得到的点击。
这里是实现。
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);
}
}
reslayoutactivity_main_drawer_closed.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>
reslayoutactivity_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>
resdrawabledrawer_notch.xml。
<shape
android:shape="rectangle">
<corners android:radius="4dp" />
<solid android:color="@color/colorAccent" />
</shape>
appbuild.gradle
android {
defaultConfig {
minSdkVersion 19
.
.
.
}
.
.
.
}
结果:
首先添加安卓系统 material
在您的 Gradle
:
implementation 'com.google.android.material:material:1.1.0'
那你可以用 NavigationView
像这样的组件。
<com.google.android.material.navigation.NavigationView
android:id="@+id/navi_view"
android:layout_width="wrap_content"
android:layout_height="100dp"
android:background="@color/colorPrimary"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<Button
android:id="@+id/btn1"
android:layout_width="100dp"
android:layout_height="100dp"
android:text="btn1" />
<Button
android:id="@+id/btn2"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="end"
android:text="btn2" />
</com.google.android.material.navigation.NavigationView>
这是一个非常简单的例子,没有惯例,你应该改进它。