HouseProperty/app/src/main/java/imageselector/FullScreenOnlinePreviewActivity.java

package imageselector;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;

import com.sl.house_property.R;

import java.io.File;
import java.util.ArrayList;

import imageselector.adapter.FullScreenImagePagerAdapter;
import imageselector.adapter.FullScreenOnlineImagePagerAdapter;
import imageselector.entry.Image;
import imageselector.utils.ImageSelector;
import imageselector.view.MyViewPager;

public class FullScreenOnlinePreviewActivity extends AppCompatActivity {

    private MyViewPager vpImage;
    private TextView tvIndicator;


    //tempImages和tempSelectImages用于图片列表数据的页面传输。
    //之所以不要Intent传输这两个图片列表，因为要保证两位页面操作的是同一个列表数据，同时可以避免数据量大时，
    // 用Intent传输发生的错误问题。
    private static ArrayList<String> tempImages;

    private ArrayList<String> mImages;
    private boolean isShowBar = true;
    private boolean isConfirm = false;


    public static void openActivity(Activity activity, ArrayList<String> images, int position) {
        tempImages = images;
        Intent intent = new Intent(activity, FullScreenOnlinePreviewActivity.class);
        intent.putExtra(ImageSelector.POSITION, position);
        activity.startActivityForResult(intent, ImageSelector.RESULT_CODE);
    }

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

        setStatusBarVisible(true);
        mImages = tempImages;
        tempImages = null;
        Intent intent = getIntent();
        setStatusBarColor();
        initView();
        initListener();
        initViewPager();

        tvIndicator.setText(1 + "/" + mImages.size());
        vpImage.setCurrentItem(intent.getIntExtra(ImageSelector.POSITION, 0));
    }

    private void initView() {
        vpImage = (MyViewPager) findViewById(R.id.vp_image);
        tvIndicator = (TextView) findViewById(R.id.tv_indicator);
    }

    private void initListener() {
        findViewById(R.id.btn_back).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });

    }

    /**
     * 初始化ViewPager
     */
    private void initViewPager() {
        FullScreenOnlineImagePagerAdapter adapter = new FullScreenOnlineImagePagerAdapter(this, mImages);
        vpImage.setAdapter(adapter);

        vpImage.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            }

            @Override
            public void onPageSelected(int position) {
                tvIndicator.setText(position + 1 + "/" + mImages.size());

            }

            @Override
            public void onPageScrollStateChanged(int state) {
            }
        });
    }

    /**
     * 修改状态栏颜色
     */
    private void setStatusBarColor() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = getWindow();
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.parseColor("#373c3d"));
        }
    }

    /**
     * 获取状态栏高度
     *
     * @param context
     * @return
     */
    public static int getStatusBarHeight(Context context) {
        int result = 0;
        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = context.getResources().getDimensionPixelSize(resourceId);
        }
        return result;
    }

    /**
     * 显示和隐藏状态栏
     *
     * @param show
     */
    private void setStatusBarVisible(boolean show) {
        if (show) {
            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
        } else {
            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_FULLSCREEN);
        }
    }

    /**
     * 显示头部和尾部栏
     */
    private void showBar() {
        isShowBar = true;

    }

    /**
     * 隐藏头部和尾部栏
     */
    private void hideBar() {
        isShowBar = false;

    }






    @Override
    public void finish() {
        //Activity关闭时，通过Intent把用户的操作(确定/返回)传给ImageSelectActivity。
        Intent intent = new Intent();
        intent.putExtra(ImageSelector.IS_CONFIRM, isConfirm);
        setResult(ImageSelector.RESULT_CODE, intent);
        super.finish();
    }
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        //非默认值
        if (newConfig.fontScale != 1){
            getResources();
        }
        super.onConfigurationChanged(newConfig);
    }

    @Override
    public Resources getResources() {//还原字体大小
        Resources res = super.getResources();
        //非默认值
        if (res.getConfiguration().fontScale != 1) {
            Configuration newConfig = new Configuration();
            newConfig.setToDefaults();//设置默认
            res.updateConfiguration(newConfig, res.getDisplayMetrics());
        }
        return res;
    }
}