unable to start activity componentinfo java lang nullpointerexception
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向下一个活动传递数据:(代码来源《第一行代码》)
...
/*firstactivity*/
public void onClick(View v) {
String data="Hello SecondActivity";
Intent intent=new Intent(FirstActivity.this,SecondActivity.class);
intent.putExtra("extra_data",data);
startActivity(intent);
}
/*secondactivity*/
setContentView(R.layout.second_layout);
intent intent=getIntent();
String data=intent.getStringExtra("extra_data"); //extra_data写错,导致secondactivity接受不到数据,nullpoint
Log.d("SecondActivity", data);
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