CacheActivity.java
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package com.cnlive.demo.video.cache;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.v4.app.ActivityCompat;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;
import com.cnlive.demo.video.R;
import com.cnlive.demo.video.cache.adapter.CacheFragmentPagerAdapter;
/**
* Created by gujun on 2017/10/20.
*/
public class CacheActivity extends AppCompatActivity {
private ViewPager viewPager;
private TabLayout tabLayout;
private CacheFragmentPagerAdapter adapter;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cache);
init();
}
private void init() {
viewPager = (ViewPager) findViewById(R.id.viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabLayout);
adapter = new CacheFragmentPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
verifyStoragePermissions(this);
}
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
"android.permission.READ_EXTERNAL_STORAGE",
"android.permission.WRITE_EXTERNAL_STORAGE" };
public static void verifyStoragePermissions(Activity activity) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
return;
try {
//检测是否有写的权限
int permission = ActivityCompat.checkSelfPermission(activity,
"android.permission.WRITE_EXTERNAL_STORAGE");
if (permission != PackageManager.PERMISSION_GRANTED) {
// 没有写的权限，去申请写的权限，会弹出对话框
ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,REQUEST_EXTERNAL_STORAGE);
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == REQUEST_EXTERNAL_STORAGE) {
if (allRequestsPermitted(grantResults))
Toast.makeText(this, "Permission Granted!", Toast.LENGTH_SHORT).show();
else
Toast.makeText(this, "Permission Denied!", Toast.LENGTH_SHORT).show();
}
}
private boolean allRequestsPermitted(int[] grantResults) {
for (int result : grantResults)
if (result == PackageManager.PERMISSION_DENIED)
return false;
return true;
}
}