Question

如何从此活动传递额外数据？

public class DetailActivity extends Activity {
    @Override
    public void onBackPressed() {
    }

    @SuppressLint("NextAPI")
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detail);
        Button btnForum = (Button) findViewById(R.id.btnForum);
        Button btnKuis = (Button) findViewById(R.id.btnKuis);

        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }

        showInfo();

        final Button btnLogout = (Button) findViewById(R.id.btnBack);
        btnLogout.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent newActivity = new Intent(DetailActivity.this,MainActivity.class);
                startActivity(newActivity);
            }
        });

        btnForum.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
                Intent forum = new Intent(DetailActivity.this, Forum.class);                    ;
                startActivity(forum);   
            }

        });

        btnKuis.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            Intent kuis = new Intent(DetailActivity.this, Kuisioner.class);                 ;
            startActivity(kuis);    
            }
        });
    }

    public void showInfo(){
        final TextView tNrp = (TextView)findViewById(R.id.txtNrp);
        final TextView tName = (TextView)findViewById(R.id.txtName);
        final TextView tSmt = (TextView)findViewById(R.id.txtSmt);
        final TextView tStatus = (TextView)findViewById(R.id.txtStatus);

        String url = "http://xxx/blabla/getID.php";

        Intent intent = getIntent();
        String MhsID = intent.getStringExtra("idm");

        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("sMhsID", MhsID));

        String resultServer  = getHttpPost(url,params);

        String strMemberID = "";
        String strNrp = "";
        String strPassword = "";
        String strName = "";
        String strSmt = "";
        String strStatus = "";

        JSONObject c;
        try {
            c = new JSONObject(resultServer);

            strNrp = c.getString("idm");
            strName = c.getString("nama-mahasiswa");
            strSmt = c.getString("semester");
            strStatus = c.getString("status-mahasiswa");

            if(!strMemberID.equals(""))
            {
                tNrp.setText(strNrp);
                tName.setText(strName);
                tSmt.setText(strSmt);
                tStatus.setText(strStatus);
            }
            else
            {
                tNrp.setText("-");
                tName.setText("-");
                tSmt.setText("-");
                tStatus.setText("-");       
            }
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public String getHttpPost(String url,List<NameValuePair> params) {
        StringBuilder str = new StringBuilder();
        HttpClient client = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);

        try {
            httpPost.setEntity(new UrlEncodedFormEntity(params));
            HttpResponse response = client.execute(httpPost);
            StatusLine statusLine = response.getStatusLine();
            int statusCode = statusLine.getStatusCode();
            if (statusCode == 200) { // Status OK
                HttpEntity entity = response.getEntity();
                InputStream content = entity.getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(content));
                String line;
                while ((line = reader.readLine()) != null) {
                    str.append(line);
                }
            } else {
                Log.e("Log", "Failed to download result..");
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str.toString();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
        }
    }

此 DetailActivity 已经有来自上一个活动的额外数据，但我需要传递额外的数据＆＃34; idm＆＃34;到 Kuisioner 活动。任何人都可以教我如何做到这一点？请这对我来说非常重要:(

Answer 1

在DetailActivity.java中：

Intent kuis = new Intent(DetailActivity.this, Kuisioner.class);                 
kuis.putExta("Key_hossam", "value"); // just add this line
startActivity(kuis);

在Kuisioner.java中：

在onCreate方法中只需写下这些行

 Intent intent= getIntent();
    Bundle b = intent.getExtras();
     if(b!=null)
     {
            String value =(String) b.get("Key_hossam");
     }
    }

Answer 2

将String MhsID声明为类级成员字段，如

public class DetailActivity extends Activity {

 private String MhsID = null;

现在在showInfo中获取Intent数据，如

public void showInfo(){
        ....
        Intent intent = getIntent();
        MhsID = intent.getStringExtra("idm");
        ....

并使用MhsID通过Kuisioner将putExtra()的值传递给Intent活动，就像您之前的活动中所做的那样

btnKuis.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent kuis = new Intent(DetailActivity.this, Kuisioner.class);   
            kuis.putExtra("idm",MhsID);              
            startActivity(kuis);    
            }
        });

并在String idm活动中获得与此活动相同的Kuisioner。

Answer 3

所有解释都是 HERE。

只需添加以下代码：

intent.putExtra(name, value);

因此，开始新的 Kuisioner 活动应如下所示：

String value = "Example value"
Intent kuis = new Intent(DetailActivity.this, Kuisioner.class);
kuis.putExtra("idm", value);
startActivity(kuis);

Answer 4

如果您正在使用太多变量，并希望在活动之间传递数据，我建议您将Activity-variables static ，并使用类名，不再维护变量。

注意：我假设你正在使用Fragments，你可能会再次回到活动n。

如何将此活动的额外数据传递给下一个活动？

4 个答案: