我正在尝试将私有字符串从MainActivity传递到另一个活动。这是代码:
MainActivity
public class MainActivity extends AppCompatActivity {
private String data1;
private String data2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Direct to data Input page and then to the next page
TextView text = findViewById(R.id.data_text);
text.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setContentView(R.layout.datalayout);
EditText data = findViewById(R.id.Data1);
MainActivity.this.data1 = data.getText().toString();
data = findViewById(R.id.Data2);
MainActivity.this.data2 = data.getText().toString();
v = (ImageView) findViewById(R.id.continueNext);
MainActivity.this.redirectToAnotherPage(v, MainActivity.this, AnotherActivity.class);
}
});
private void redirectToAnotherPage(View view, final Context baseActivity, final Class newActivity) {
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent myIntent = new Intent(baseActivity, newActivity);
//Pass data between MainActivity and the launching activity using bundle
Bundle bundle = new Bundle();
bundle.putString("Data1",data1);
bundle.putString("Data2",data2);
myIntent.putExtras(bundle);
//End MainActivity before starting new activity
MainActivity.this.finish();
startActivity(myIntent);
}
});
}
另一个活动
public class AnotherActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.page);
//Get data from MainActivity using Bundle
Bundle viewData = getIntent().getExtras();
String dataToInclude = viewData.getString("Data1");
Toast toast = Toast.makeText(getApplicationContext(),dataToInclude,Toast.LENGTH_LONG);
toast.show();
}
当我传递String类型的data1和data2时,看不到Toast消息。我在这里做什么错了?
答案 0 :(得分:1)
您的代码难以理解:
1)你在做什么? setContentView(R.layout.datalayout);
2)data
中的data.getText().toString();
如果您看到吐司中没有任何文字,则表示dataToInclude
是null
或为空。
因此,请重点检查data1
和data2
变量。
编辑:点击text
后,监听器将立即执行:
新版式将显示为空的EditText,其空字符串将存储在data1
和data2
中,然后使用捆绑包中的空字符串打开新活动。
答案 1 :(得分:0)
您没有调用toast.show()。这样做-
Toast toast = Toast.makeText(getApplicationContext(),dataToInclude,Toast.LENGTH_LONG);
toast.show();
或
Toast.makeText(getApplicationContext(), dataToInclude, Toast.LENGTH_LONG).show();
答案 2 :(得分:0)
您可以仅在意图上使用putExtra方法,如下所示:
myIntent.putExtra("key", value);
在其他活动中,只需按照以下意图获取数据
String value = getIntent().getStringExtra("key");