Android5.x新特性之ViewOutlineProvider轮廓、阴影---setClipToOutline裁剪

——————————————————效果1————————————————————



activity_main.xml主界面布局文件如下

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/sample_main_layout">

<FrameLayout
android:id="@+id/sample_content_fragment"
android:layout_weight="2"
android:layout_width="match_parent"
android:layout_height="0px" />

</LinearLayout>

MainActivity主界面代码实现

package com.imooc.material.shadows.drag;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends FragmentActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

if (savedInstanceState == null) {
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
ElevationDragFragment fragment = new ElevationDragFragment();
transaction.replace(R.id.sample_content_fragment, fragment);
transaction.commit();
}
}

}

ztranslation.xml fragment布局如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_layout"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<View
android:id="@+id/circle"
android:layout_width="96dp"
android:layout_height="96dp"
android:layout_gravity="center"
android:background="#BF3EFF" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_margin="16dp" >

<Button
android:id="@+id/raise_bt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="Z+" />

<Button
android:id="@+id/lower_bt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="Z-" />
</LinearLayout>

</LinearLayout>

ElevationDragFragment

package com.imooc.material.shadows.drag;

import android.graphics.Outline;
import android.graphics.Rect;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewOutlineProvider;

public class ElevationDragFragment extends Fragment {

private ViewOutlineProvider mOutlineProviderCircle;

private float mElevation = 0;

private int mElevationStep;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

mOutlineProviderCircle = new CircleOutlineProvider();

mElevationStep = getResources().getDimensionPixelSize(
R.dimen.elevation_step);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.ztranslation, container,
false);
final View floatingShape = rootView.findViewById(R.id.circle);

floatingShape.setOutlineProvider(mOutlineProviderCircle);
floatingShape.setClipToOutline(true);

rootView.findViewById(R.id.raise_bt).setOnClickListener(
new View.OnClickListener() {

@Override
public void onClick(View v) {
mElevation += mElevationStep;
floatingShape.setElevation(mElevation);

}
});

rootView.findViewById(R.id.lower_bt).setOnClickListener(
new View.OnClickListener() {

@Override
public void onClick(View v) {
mElevation -= mElevationStep;
if (mElevation < 0) {
mElevation = 0;
}

floatingShape.setElevation(mElevation);

}
});
return rootView;
}

private class CircleOutlineProvider extends ViewOutlineProvider {
@Override
public void getOutline(View view, Outline outline) {
outline.setOval(0, 0, view.getWidth(), view.getHeight());

}
}

}

——————————————————效果2————————————————————



activity_main.xml 主界面布局问下如下

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/sample_main_layout">

<FrameLayout
android:id="@+id/sample_content_fragment"
android:layout_weight="2"
android:layout_width="match_parent"
android:layout_height="0px" />

</LinearLayout>

主界面代码如下MainActivity

package com.imooc.material.shadows.drag;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends FragmentActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

if (savedInstanceState == null) {
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
ElevationDragFragment fragment = new ElevationDragFragment();
transaction.replace(R.id.sample_content_fragment, fragment);
transaction.commit();
}
}

}

ztranslation.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_layout"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<View
android:id="@+id/circle"
android:layout_width="fill_parent"
android:layout_height="96dp"
android:layout_gravity="center"
android:background="#BF3EFF" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_margin="16dp" >

<Button
android:id="@+id/raise_bt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="Z+" />

<Button
android:id="@+id/lower_bt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="Z-" />
</LinearLayout>

<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />

</LinearLayout>

ElevationDragFragment

package com.imooc.material.shadows.drag;

import android.graphics.Outline;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewOutlineProvider;
import android.widget.Button;

public class ElevationDragFragment extends Fragment {

private ViewOutlineProvider mOutlineProviderCircle;

private float mElevation = 0;

private int mElevationStep;

Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

mOutlineProviderCircle = new CircleOutlineProvider();

mElevationStep = getResources().getDimensionPixelSize(
R.dimen.elevation_step);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.ztranslation, container,
false);
button = (Button) rootView.findViewById(R.id.button);
final View floatingShape = rootView.findViewById(R.id.circle);

floatingShape.setOutlineProvider(mOutlineProviderCircle);
floatingShape.setClipToOutline(true);

button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
//如果处于裁剪状态，恢复即可
if (floatingShape.getClipToOutline()) {
floatingShape.setClipToOutline(false);

}else {
floatingShape.setClipToOutline(true);
}
}
});

rootView.findViewById(R.id.raise_bt).setOnClickListener(
new View.OnClickListener() {

@Override
public void onClick(View v) {
mElevation += mElevationStep;
floatingShape.setElevation(mElevation);

}
});

rootView.findViewById(R.id.lower_bt).setOnClickListener(
new View.OnClickListener() {

@Override
public void onClick(View v) {
mElevation -= mElevationStep;
if (mElevation < 0) {
mElevation = 0;
}

floatingShape.setElevation(mElevation);

}
});
return rootView;
}

private class CircleOutlineProvider extends ViewOutlineProvider {
@Override
public void getOutline(View view, Outline outline) {
int margin = Math.min(view.getWidth(), view.getHeight())/10;
//view是match_parent的
outline.setRoundRect(margin, margin, view.getWidth() - margin, view.getHeight() , margin/2);
}
}

}