Android应用BaseActivity

基类Activity

public abstract class BaseActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE); // 取消标题

        getWindow().setSoftInputMode( WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN );

    }

    @Override
    protected void onResume() {
        super.onResume();
		//隐藏状态栏 控制栏
        getWindow().getDecorView().setSystemUiVisibility(
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE | 
				View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | 
				View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | 
				View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | 
				View.SYSTEM_UI_FLAG_FULLSCREEN | 
				View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
    }



    /**
     * 需要获取的权限列表
     */
    private String[] permissions = new String[]{
            Manifest.permission.CAMERA,
    };

    /**
     * 动态申请权限的请求码
     */
    private static final int PERMISSION_REQUEST_CODE = 100;

    /**
     * 动态申请权限
     */
    @RequiresApi(api = Build.VERSION_CODES.M)
    public boolean initPermissions() {
        if (!isHasPermission()) {
            //动态申请权限 , 第二参数是请求吗
            requestPermissions(permissions, PERMISSION_REQUEST_CODE);
            return false;
        }
        return true;
    }

    /**
     * 判断是否有 permissions 中的权限
     *
     * @return
     */
    @RequiresApi(api = Build.VERSION_CODES.M)
    public boolean isHasPermission() {
        for (String permission : permissions) {
            if (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }
        return true;
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == PERMISSION_REQUEST_CODE) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //权限被用户同意,做相应的事情
                init();
            } else {
                //权限被用户拒绝，做相应的事情
                finish();
            }
        }
    }

    public abstract void init();
}