从A_activity由Intent跳转B_activity后,为什么B中的View监控器会报异常:
B_activity中相关代码:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_decode);
btnCreate=(Button)findViewById(R.id.btnCreate);
iv2DCode=(ImageView)findViewById(R.id.iv2DCode);
etContent=(EditText)findViewById(R.id.etContent);
//生成二维码
btnCreate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String codeContent=etContent.getText().toString();
try {
Bitmap bm2DCode = new DecodeAndEncode().Create2DCode(codeContent);
iv2DCode.setImageBitmap(bm2DCode);
} catch (WriterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} }
});
}
B_activity中相关代码:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_decode);
btnCreate=(Button)findViewById(R.id.btnCreate);
iv2DCode=(ImageView)findViewById(R.id.iv2DCode);
etContent=(EditText)findViewById(R.id.etContent);
//生成二维码
btnCreate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String codeContent=etContent.getText().toString();
try {
Bitmap bm2DCode = new DecodeAndEncode().Create2DCode(codeContent);
iv2DCode.setImageBitmap(bm2DCode);
} catch (WriterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} }
});
}
解决方案 »
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比如设为""等不规则的字符
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_decode);
btnCreate=(Button)findViewById(R.id.btnCreate);
iv2DCode=(ImageView)findViewById(R.id.iv2DCode);
etContent=(EditText)findViewById(R.id.etContent);
//生成二维码
btnCreate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String codeContent=etContent.getText().toString();
try {
Bitmap bm2DCode = new DecodeAndEncode().Create2DCode(codeContent);
iv2DCode.setImageBitmap(bm2DCode);
} catch (WriterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} }
});
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_decode);
btnCreate=(Button)findViewById(R.id.btnCreate);
iv2DCode=(ImageView)findViewById(R.id.iv2DCode);
etContent=(EditText)findViewById(R.id.etContent);
//生成二维码
btnCreate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String codeContent=etContent.getText().toString();
/**try {
Bitmap bm2DCode = new DecodeAndEncode().Create2DCode(codeContent);
iv2DCode.setImageBitmap(bm2DCode);
} catch (WriterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}**/ }
});
}