腾讯浏览服务 SDK 接入指南

public class PreviewActivity extends AppCompatActivity {
    private FrameLayout mFlRoot; //内容显示区域
    private RelativeLayout mRl; //自定义标题栏
    private boolean isDestroyed = false;

    public static void start(Context context, String filePath,String fileExt) {
        context = context.getApplicationContext();
        Intent starter = new Intent(context, PreviewActivity.class);
        starter.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        starter.putExtra("filePath", filePath);
        starter.putExtra("fileExt", fileExt);
        context.startActivity(starter);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_preview);
        String filePath = getIntent().getStringExtra("filePath");
        String fileExt = getIntent().getStringExtra("fileExt");
        initView();
        openFile(filePath, fileExt);
    }

    private void initView() {
        mFlRoot = findViewById(R.id.content);
        mRl = findViewById(R.id.reader_top);
    }

    private void openFile(String filePath, String fileExt) {
        //设置回调
        ITbsReaderCallback callback = new ITbsReaderCallback() {
            @Override
            public void onCallBackAction(Integer actionType, Object args, Object result) {
                Log.i(TAG, "actionType=" + actionType + "，args=" + args + "，result=" + result);
                if (args instanceof Bundle) {
                    int id = ((Bundle) args).getInt("typeId");
                    if (ITbsReader.TBS_READER_TYPE_STATUS_UI_SHUTDOWN == id) {
                        finish();       // 加密文档弹框取消需关闭activity  
                    }
                }
            }
        };
        
        //设置参数
        Bundle param = new Bundle();
        param.putString("filePath", filePath);
        param.putString("fileExt", fileExt); // 文件后缀名，如文件名为test.pdf，则只需要传入"pdf" 
        param.putString("tempPath", getExternalFilesDir("temp").getAbsolutePath());        
        //调用openFileReader打开文件
        mFlRoot.post(new Runnable() {
            @Override
            public void run() {
                int height = mFlRoot.getHeight();
                param.putInt("set_content_view_height", height); // 文档内容的显示区域高度，自定义layout模式必须传入这个值
                int ret = TbsFileInterfaceImpl.getInstance().openFileReader(
                              PreviewActivity.this, param, callback, mFlRoot);
            }
        });
    }
  
    // 销毁资源使用onpause + ondestroy的方式。避免onDestroy延迟回调 
    private void destroy()  {
        if (isDestroyed) {
            return;
        }
        // 回收资源
        mFlRoot.removeAllViews(); //移除内容显示区域layout
        TbsFileInterfaceImpl.getInstance().closeFileReader(); //关闭fileReader
        isDestroyed = true;
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (isFinishing()) {
            destroy();
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        destroy();
    }
    
    //横屏切换
    @Override
    public void onConfigurationChanged(@NonNull Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        DisplayMetrics dm = new DisplayMetrics();
        ((Activity)this).getWindowManager().getDefaultDisplay().getMetrics(dm);
        int w = dm.widthPixels;
        int h = dm.heightPixels - mRl.getHeight();
        TbsFileInterfaceImpl.getInstance().onSizeChanged(w, h);
    }
}