在ViewPager中的Fragment添加控件及TextureView

在ViewPager中的Fragment添加控件及TextureView

首先做一个ViewPager，这是利用一个利用FragmentPagerAdapter制作的页面。

MainActivity:

package example.com.testtextureview;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends FragmentActivity
{

private ViewPager pager;
private List<String> titleList;
private List<Fragment> fragList;

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

titleList = new ArrayList<String>();
titleList.add("第1页");
titleList.add("第2页");
titleList.add("第3页");
titleList.add("第4页");

pager = (ViewPager) findViewById(R.id.pager);

fragList = new ArrayList<Fragment>();
fragList.add(new Fragment1());
fragList.add(new Fragment2());
fragList.add(new Fragment3());
fragList.add(new Fragment4());

tab = (PagerTabStrip) findViewById(R.id.tab);
tab.setBackgroundColor(Color.RED);
tab.setTextColor(Color.WHITE);
tab.setDrawFullUnderline(false);
tab.setTabIndicatorColor(Color.WHITE);

MyFragmentPagerAdapter adapter = new MyFragmentPagerAdapter(
getSupportFragmentManager(), fragList, titleList);
pager.setAdapter(adapter);
}

}

适配器MyFragmentPagerAdapter:

package example.com.testtextureview;

import java.util.List;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

public class MyFragmentPagerAdapter extends FragmentPagerAdapter{

private List<Fragment>fragList;
private List<String>titleList;
public MyFragmentPagerAdapter(FragmentManager fm,List<Fragment> fragList,List<String>titleList) {
super(fm);
this.fragList=fragList;
this.titleList=titleList;
}

@Override
public Fragment getItem(int arg0) {
return fragList.get(arg0);
}

@Override
public int getCount() {
return fragList.size();
}

@Override
public CharSequence getPageTitle(int position) {
return titleList.get(position);
}

}

content_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context="com.example.testviewpager.MainActivity">

<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center">

4000
<android.support.v4.view.PagerTabStrip
android:id="@+id/tab"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_gravity="top"/>
</android.support.v4.view.ViewPager>

</RelativeLayout>

之后新建4个Fragment分别为Fragment1，Fragment2，Fragment3，Fragment4

现在我要在Fragment1中添加一个Button，

首先在xml中添加一个Button，

之后在Fragment1中代码为：

package example.com.testtextureview;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;

/**
* Created by bazinga on 2015/10/9.
*/
public class Fragment1 extends Fragment implements View.OnClickListener
{
private Button mButton;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{

View view = inflater.inflate(R.layout.fragment1,null);

mButton = (Button) view.findViewById(R.id.btn);

mButton.setOnClickListener(this);

return view;
}

@Override
public void onClick(View view)
{
Toast.makeText(getActivity(), "start", Toast.LENGTH_SHORT).show();
}
}

然后我想在Fragment2中获取一个Camera，在第二页中显示TextureView；

package example.com.testtextureview;

import android.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.TextureView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RelativeLayout;

import java.io.IOException;

/**
* Created by bazinga on 2015/10/9.
*/
public class Fragment2 extends Fragment implements TextureView.SurfaceTextureListener
{
private Camera mCamera;
private TextureView mTextureView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);

RelativeLayout view = new RelativeLayout(getActivity());
view.setLayoutParams(lp);

mTextureView = new TextureView(getActivity());
mTextureView.setSurfaceTextureListener(this);
mTextureView.setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT));

view.addView(mTextureView);

return view;
}

@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
mCamera = Camera.open();
try
{
mCamera.setPreviewTexture(surface);
mCamera.startPreview();
} catch (IOException e)
{
e.printStackTrace();
}

mTextureView.setRotation(90);
mTextureView.setScaleX(2f);
}

@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1)
{

}

@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture)
{
mCamera.stopPreview();
mCamera.release();
return true;
}

@Override
public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture)
{

}
}

其中这里不需要有他自己的xml，因为这是由java代码创建，这是创建一个RelativeLayout布局，不需要获取Camera的宽度和高度，只需要将布局的宽高设置出来，将mTextureView添加进View中，设置监听。

在这里会出现摄像屏幕不能铺满整个屏幕的问题，这时候需要设置 mTextureView.setScaleX(2f);，才能将屏幕铺满，这应该是一个bug吧。