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Why does my Android activity force close when I try to access info I put in the bundle?

开发者 https://www.devze.com 2023-01-30 06:48 出处:网络
I am writing an Android app. One of the activities is a ListActivity, so when the person selects an item in the list I would like the text value of that item to be stored in the Intent/Bundle so that

I am writing an Android app. One of the activities is a ListActivity, so when the person selects an item in the list I would like the text value of that item to be stored in the Intent/Bundle so that the next activity knows that value. My code looks something like this:

lv.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView parent, View view,
            int position, long id) {

            Intent intent = new Intent(view.getContext(), FavoriteEditFromDest.class);
            intent.putExtra("com.example.myapp.Name", ((TextView) view).getText());

            startActivity(intent);
        }
      });
    }

The onCreate method for the activity that is to be started looks like this:

public void 开发者_运维技巧onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.favorite_dest_edit);

            // nameB is a global string variable defined above.
        nameB = savedInstanceState.getString("com.example.myapp.Name");
    }

When I click an item from the list in the ListActivity, it begins to execute the onCreate code, but when it gets to the line that tries to retrieve the string value I get a force close dialog.

I don't have much experience passing information with a Bundle, so I would appreciate any and all help!


nameB = savedInstanceState.getString("com.example.myapp.Name");

should be replaced with

Bundle bundle = getIntent().getExtras();
nameB = bundle.getString("com.example.myapp.Name");

try that out and see if it helps.


Use adb logcat, DDMS, or the DDMS perspective in Eclipse to examine your stack trace and see the exception that triggered your "force close".

In this case, I suspect that you will find that what you put into the Bundle is not a String, since getText() does not return a String. However, that is just a guess -- your stack trace should tell you more.


Among other problems

intent.putExtra("com.example.myapp.Name", ((TextView) view).getText());

Should be

intent.putExtra("com.example.myapp.Name", ((TextView) view).getText().toString());
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