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我有两个活动。主要活动和儿童活动。当我按下按钮时,儿童活动从此处启动。我想发送一些数据回主屏幕。我用startActivityForResult,但工作,但每次我收集数据时,它显示的数据先前的数据(即先前的数据没有得到清除,当我再次发送新的数据..形式像堆栈)?如何清除以前的数据,每次发送新数据。startActivityForResult每次发送新数据时显示以前数据的数据
MainActivity.java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
relativeLayout = (RelativeLayout) findViewById(R.id.rl_image);
ivLauncher = (ImageView) findViewById(R.id.iv_launcher);
relativeLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivityForResult(new Intent(MainActivity.this, SecondActivity.class), 1002);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1002) {
String duty = data.getStringExtra("WHICH");
if (duty.equalsIgnoreCase("flag")) {
ivLauncher.setImageResource(R.drawable.ic_assistant);
} else if (duty.equalsIgnoreCase("music")) {
ivLauncher.setImageResource(R.drawable.ic_audiotrack);
} else if (duty.equalsIgnoreCase("moon")) {
ivLauncher.setImageResource(R.drawable.ic_brightness);
}
}
super.onActivityResult(requestCode, resultCode, data);
}
SecondActivity
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
rlMoon = (RelativeLayout) findViewById(R.id.rl_moon);
rlMoon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(SecondActivity.this, MainActivity.class);
i.putExtra("WHICH", "moon");
setResult(1002, i);
finish();
}
});
rlMusic = (RelativeLayout) findViewById(R.id.rl_music);
rlMusic.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(SecondActivity.this, MainActivity.class);
i.putExtra("WHICH", "music");
setResult(1002, i);
finish();
}
});
rlFlag = (RelativeLayout) findViewById(R.id.rl_flag);
rlFlag.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(SecondActivity.this, MainActivity.class);
i.putExtra("WHICH", "flag");
setResult(1002, i);
finish();
}
});
}
后你是怎么做的 –
如果你想通过简单的数据使用捆绑,并把它的意图内,然后把它拿来子活动
。 –
欢迎来到SO!请使用您所做的代码编辑您的问题,以便其他人可以轻松帮助您!谢谢。 –