将文本设置为edittext（例外）

Question

I have :

 nameET=(EditText) findViewById(R.id.editText1);
 nameET.setText("kkkk");

inside Oncreat() function, the code give exception as below:

Answer 1

You are getting NullPointerException So there may be various reason for that.

• First check that you have declare your activity in the manifest.xml

• Second check the name of the edittext in your layout is it same you as editText1 .

• Third are you calling setContentView(R.layout.your layout where you declare your edittext); in onCreate(Bundle savedInstanceState) method of the activity.

If all the above you checked is fine then just clean your project and run. This will work.

Thanks

Answer 2

检查您的xml布局，并确保存在editText1 。

Answer 3

Two Quick Checks,

• Did you declare the activity in manifest.xml
• Are you using the same name editText1 as specified in xml and is it EditText Defined

Answer 4

setContentView is missing. Please check this in your code

Answer 5

          View inflatedView = getLayoutInflater().inflate(R.layout.activity_sliding, null);

        nameET=(EditText)inflatedView.findViewById(R.id.editText1);
                 nameET.setText("kkkk");

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use the activity which contain R.id.editText1 instead of activity_sliding