java - Zxing 库实现 : And the below part on getting back the result after the scanning Activity gives an error

Question

当来自 com.google.zxing.client.android.SCAN 的扫描 Activity 完成时，我想取回结果，并打印扫描的对象，因此我使用了 onActivityResult 方法。但是在 Toast 线上发生错误。

public void onActivityResult(int reqCode, int resCode, Intent intent1) {
if (requestCode == 0) {
    if (resCode == RESULT_OK) {
        String contents = intent.getStringExtra("SCAN_RESULT");
        String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
        Toast toast = Toast.makeText("Content:" + contents + " Format:" + format, Toast.LENGTH_LONG);
        toast.show();
    }
}

}

Answer 1

您需要将上下文传递给 Toast:

Context context = getApplicationContext();
String text = "Content:" + contents + " Format:" + format;
Toast toast = Toast.makeText(context, text, Toast.LENGTH_LONG).show();